If you like ruby, maybe you'll enjoy learning about how to access the Steem blockchain using ruby:

https://developers.steem.io/tutorials/#tutorials-ruby

One of my favorite topics is content patching:

https://developers.steem.io/tutorials-ruby/edit_content_patching

When we do edits on the blockchain, we can isolate the exact paragraph we want to amend. I like how the blockchain team took the time to implement this little feature early on because it allows app developers to efficiently amend content.