Come on over to spinster.club and sign up. I've got accounts set to require approval, so it will take a little while.
In theory you can then migrate your account by scrolling down to the bottom of preferences / settings and clicking through. It failed when I tried just now, whether that is a bug in Spinster 1 or what IDK. However, all that really does is copy your profile and follows, so instead just import that file you downloaded the other day and re-do your profile.
BUT right now the TL is absolutely nuts with posts from 2021 and stuff, as this instance is only just federating, so you might want to leave it a few days to actually start using the new instance.
Huh: and adding a Subject here results in a CW on Spinster1. Weird.