The biggest advice I’d give is that you understand beforehand that you are going to a place with a different culture and should try to adjust the best you can.
This means learning the language, respecting their rules, etc. It’s a bit overwhelming at first but after a few months it starts feeling natural.
Germany overall is great if you want a place that is tidy and like having a large set of rules that make sure everything works the way it’s supposed to.
Biggest issue right now seems to be moderation being difficult due to federation.
I think, once that issue is tackled, we’ll see Lemmy grow more naturally.