That sounds like an overloaded server. If you not willing to put up your own server, you might try a few of the smaller public instances.

There is only so much traffic the larger instances can handle, and right now it seems like everyone and every community is on only a handful.

As far as I know, there isn’t an account migration mechanism in Lemmy yet. I’ve heard (fourth hand at best) that it is in the works but hasn’t been implemented yet. You may have to do it the hard way. Copy, paste and search.

Drama surrounding the .ml TLD.

Honestly, I’m a little suprised lemmy.ml is still up. lemmy.fmhy.ml has already gone down. This was what lead to me standing up my own instance.