I've personally had the feeling for a long time that most of the things I write don't feel very worthy of entire blog posts. That meant that I just didn't write anything. However, writing stuff up is a really great way to actually absorb what you read / study.
So I decided to start taking public notes: https://paramsingh.github.io/notes/
I don't hold my notes to the high standard of a blog so they can be works in progress or just random things.