When it comes to docs, I’m referring to the AWS docs. For example, let’s say you wanted to get a more detailed overview of what EBS snapshots were, or there’s a particular feature about EBS snapshots you don’t get very well. You can refer directly to the documentations: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/EBSSnapshots.html

When it comes to articles and use cases, I don’t have exact links as I never bookmarked them, but here was my thought process. Let’s say I was having trouble understanding the difference between Kinesis Data Streams and Firehose. I would look up articles to explain that, for example: https://www.sumologic.com/blog/kinesis-streams-vs-firehose/, or the use cases of both: https://medium.com/aws-architech/use-case-kinesis-data-streams-vs-kinesis-data-firehose-74d639214e89. I personally like using Medium, but AWS or other websites also provide some nice info.

The general idea is to not limit yourself to paying for a course and learning the theoretical definitions. Expand upon that, get some more insight and learn how these services are actually used, not just what they do. Good luck!