> What made it worth it for you?

Learning to hit publish even when you're full of doubt is the cure for self-doubt. Stop letting doubt rule your life and do the things you want to do!

> Any practical format that lowers the bar (length, cadence, themes)?

My recommendation, short posts at least once a week revolving around a single topic

> If you were starting today, what would you do differently?

I would not have built my own blog from scratch, I would just use one of the many fine options out there. Be realistic, you likely will not get many readers, at least not for a while. The value of blogging is what you learn about writing and the topic you write about it.