@IOcase Hello, and welcome to Qoto.
Enjoy the network and all it has to offer. If you are new to using Mastodon, there's a good guide here: https://lifehacker.com/a-beginner-s-guide-to-mastodon-1828503235
We also have another new users guide, posted here : https://write.tedomum.net/rgx/suggestions-and-guidelines-for-new-users-written-by-mastodon-art-administrator
@IOcase I could also suggest you look at my blog post about choosing an instance, which has a number of descriptions of some I participate in and like.
https://write.tedomum.net/rgx/is-it-important-which-instance-you-are-in