What makes mastodon the unique are the communities. Get to know the admins of your servers. They are people like you are! Support them if you can afford to. (or even run your own node, there even is a managed hosting service out there for mastodon)
multiple accounts or to move accounts happen. Don't worry about your metrics, you won't be penalized for them. Post quality content, interact with others. Chances are you will find the same reciprocated.
Welcome to mastodon! :)