Welcome back.
Pretty much whole Steem community minus some Koreans moved to Hive.
There are many front end interfaces which allow you to blog on the Hive blockchain.
Peakd.com, hive.blog and Eccency are the three biggest generalist ones.
Then there are community based front-ends like Leofinance.io, stemgeeks.net and many more. They only display content with their relevant tag.
All the content goes on the Hive blockchain and all can earn HIVE and HBD as rewards.
Many communities also have their own 2nd layer token (eg LEO) which creates an additional source of earning for upvotes.
There are also games like Splinterlands.com and short form content platforms like D.Buzz.
Its all accessible with a single password and click using Hive Keychain.
Thank you for the comment @apshamilton . I am learning so much today :) I will most certainly check out splinterlands and all you mentioned above.
@apshamilton A question around communities. If I join a community for example GEMS, will my post automatically be posted in this community or do you need to specify in which community your post will appear.
In order for your posts to appear in a particular community (say GEMS) you need to either use the GEMS tag when posting from peakd, hive.blog etc or use the GEMS community front end, where the tag will be added automatically.
People are part of many communities and different posts by a person will be suitable for different communities. A post can be tagged for multiple communities if it is relevant to more than one.
Great thank you very much