How I Earned 2 AWS Foundational Certifications in 2 Months, Before Turning 20

• Certifications: AWS Certified Cloud Practitioner (CLF-C02) and AWS Certified AI Practitioner (AIF-C01)
• Timeline: about 2 months total, roughly 4 weeks per exam
• Most important resource: Stéphane Maarek's Udemy courses
• Free resources: the official exam guides, AWS Skill Builder, Official Practice Question Sets, and the AWS Free Tier
• Study time: About 2 hours a day
• Biggest lesson: take Cloud Practitioner first. It makes AI Practitioner a lot easier.

A little about me

Why these two certifications?

• AWS Certified Cloud Practitioner (CLF-C02)  is the big picture of AWS: cloud concepts, security and the shared responsibility model, core services, and billing and pricing.
• AWS Certified AI Practitioner (AIF-C01)  covers AI, machine learning (ML), and generative AI concepts, plus which AWS services fit which use case.

The exams at a glance

• CLF-C02: Cloud Concepts (24%), Security and Compliance (30%), Cloud Technology and Services (34%), Billing, Pricing, and Support (12%)
• AIF-C01: Fundamentals of AI and ML (20%), Fundamentals of GenAI (24%), Applications of Foundation Models (28%), Guidelines for Responsible AI (14%), Security, Compliance, and Governance for AI Solutions (14%)

My 2-month plan

My study materials

1. Stéphane Maarek's Udemy courses (the most important one)

• Ultimate AWS Certified Cloud Practitioner CLF-C02 
• Ultimate AWS Certified AI Practitioner AIF-C01 

• They're built around the exam guide. I never felt like I was memorizing random trivia.
• Hands-on demos. Seeing services used in the AWS console made the names stick.
• Short, focused lectures. Easy to fit into a busy day.
• A full practice exam with explanations is included. Going through the explanations, especially for questions I got right by guessing, taught me as much as the lectures did.

• Watched at 1.25x speed, slowing down for brand-new topics
• Kept a running "service → what it does → when to use it" list
• Rewatched the sections for any domain where I scored low in practice

2. Free resources from AWS

• Official exam guides for CLF-C02  and AIF-C01 . This is the real syllabus. I used the domains and task statements as a checklist.
• AWS Skill Builder , AWS's own learning platform. Everything below marked "Skill Builder" is in its free catalog.
• Official Practice Question Sets (Skill Builder). 20 exam-style questions written by AWS, with explanations. Search for "Official Practice Question Set" plus the exam code.
• Exam Prep Standard Courses (Skill Builder). Domain-by-domain review from AWS, with tips on how to approach the questions.
• AWS Free Tier . New accounts get $100 in credits at sign-up and can earn up to $100 more by completing short activities with Amazon EC2, Amazon RDS, AWS Lambda, Amazon Bedrock, and AWS Budgets. Those are exam topics anyway, so it's hands-on practice that pays you back. Start with the AWS Budgets activity so you have a cost alert from day one.

• AWS Cloud Practitioner Essentials (Skill Builder). The official intro course. Great when you want a second explanation of something that didn't click.
• Whitepapers: Overview of Amazon Web Services  and the AWS Well-Architected Framework . I skimmed these for the big ideas rather than reading every page.

• The free AI foundational training in the AIF-C01 Exam Prep Plan (Skill Builder), covering ML and generative AI basics, prompt engineering, responsible AI, and security for AI.
• The Amazon Bedrock text playground. Sending a few prompts and changing settings like temperature made the GenAI questions much easier to reason about.

What to focus on

Cloud Practitioner (CLF-C02)

• The shared responsibility model: AWS is responsible for security of the cloud, you're responsible for security in the cloud
• Pricing options: On-Demand, Savings Plans, Reserved Instances, and Spot Instances
• Global infrastructure: Regions, Availability Zones, and edge locations
• The six pillars of the AWS Well-Architected Framework
• AWS Support plans and what each one includes

AI Practitioner (AIF-C01)

• ML basics: supervised vs. unsupervised vs. reinforcement learning, training vs. inference, overfitting vs. underfitting, and metrics like accuracy, precision, recall, and F1 score
• Generative AI basics: tokens, embeddings, foundation models, hallucinations, and inference settings like temperature
• Customizing a model: when to use prompt engineering vs. retrieval-augmented generation (RAG) vs. fine-tuning, and how cost and effort change with each
• Prompting techniques: zero-shot, few-shot, chain-of-thought, and risks like prompt injection
• Responsible AI: bias, fairness, transparency, explainability, and human review
• Security and governance: IAM, encryption, data privacy, and logging for AI workloads

Exam day tips

• Try the AWS Exam Demo on Pearson VUE's AWS page  so the interface (flagging questions, the review screen) isn't new on exam day.
• Testing online? Run the system test ahead of time, clear your desk, keep your ID ready, and start check-in early.
• Never leave a question blank. Unanswered questions are scored as incorrect, and there's no penalty for guessing.
• Flag and move on. Answer what you know, flag what you don't, and come back at the end.
• Eliminate first. On foundational exams, one or two options are usually clearly wrong.
• Watch the keywords. Phrases like "MOST cost-effective" or "LEAST operational overhead" usually decide the answer.
• Non-native English speaker? You can request the ESL +30 accommodation in your AWS Certification account for 30 extra minutes on exams taken in English. Request it before you schedule.

Money-saving tips (especially for students)

• Use your 50% voucher. After you pass an AWS Certification exam, you get a 50% discount voucher  for your next exam or a recertification. You'll find it in your AWS Certification account. Take CLF-C02 first, and your AIF-C01 exam costs half.
• AWS Student Rewards. If you're a verified university student (18+), Student Rewards on AWS Builder Center  gives you 12 months of premium Skill Builder once you verify and complete your profile. As you earn Builder Center badges by publishing articles, commenting, and staying active, you unlock AWS credits and, at 21 badges, a voucher for a Foundational certification exam.
• Under 18? Teens aged 13–17 can take AWS Certification exams with a parent or legal guardian's consent (see the AWS Certification policies ). AWS Educate  is also free for learners 13 and older and doesn't require an AWS account.

Final thoughts