One of the best framings I have learned is to teach yourself by writing. Think of it as a conversation with your friends and you are learning together.
Take the negative comments as a motivation to improve.
Go for it.
Well that's the thing... You don't. It's a very passive approach if you are actively looking for a job.
Posting solutions to interesting challenges you come across has a lot of potential getting asked to interview for jobs that solve similar problems. A generic article about "top 5 Gen AI projects" will be fruitless, but a post about how you practically "abused ramfs to make database tests 5x faster" might be.
I'm working on this myself, for myself, as I hope to become self-sufficient and not dependent on any one employer, and also to increase the reach of content for its own sake for the benefit of all, not just a single team/group/org.