Wlecome @tuturu other than GU hive has plenty other communities and also some games like splinterland that you could check out. By the way, This is @macchiata from @OCD (original content decentralized) team. We saw that you already posted your first post here in Hive Blockchain!
It would be awesome if you do an introduction post. As a sample of what an great intro post is, you can refer to this intro post for reference:
Keeping Up With the Buzz - My Introduction to the Hive Community
There's no pressure on this. You can choose whatever information you would like to share.
You can tag me @macchiata on your introduction post if you have done with it.