@Zero22xx There are multiple Friendica instances. You can check them in the Friendica Directory (in the servers section) or other more global lists of Fediverse servers like the-federation.info, FediDB etc. Friendica has groups too, but besides the [email protected] (or probably even the [email protected] one) they’re pretty much lacking activity (you’re still free to post anyway, there are plenty of them).
If you need some help, you can also post on the former one by creating a regular post and mentioning the group with “!” or “@”. I have also created a megathread with various resources and a small Q&A (it’s actually vice-versa tbh, since the Q&A took the most space on it, but I digress) in order to get yourself started: https://libranet.de/display/0b6b25a8-2167-82af-600d-9ea129892452
@Zero22xx It depends. What use case did you have in mind?