Click on "Communities" on the side bar, or if on mobile, the 3 lines on the upper left hand corner. Join the ones that look cool. Then when you post a blog, you can choose under the input part which community you want to post in out of the ones you have joined.
Everyone who joined that community even on peakd ecency and hive.blog, so it's always worth posting in a community!
You may find there are a handful with pretty strict rules. Most are pretty open. I started Cross Culture, but honestly, I don't check it much there days, not enough time. I still post there though and I see a few others do too.
https://inleo.io/threads/view/avaphoenix/re-selfhelp4trolls-2ryvvpkho?referral=avaphoenix