Here are some resources you'll find handy for this section:

AWS Certification Home Page: https://aws.amazon.com/certification

Official AWS Certified Solutions Architect Exam Guide: https://d1.awsstatic.com/training-and-certification/docs-sa-assoc/AWS-Certified-Solutions-Architect-Associate_Exam-Guide.pdf

Get started with a free AWS Account: https://aws.amazon.com/free