“The content” on all Lemmy instances is the same. There is no account migration, but you can just sign up on lemmy.ml. If you already had an account there and you want it back… I don’t know if it’s possible for an admin there to restore it, you might have to get in touch with them.

I mentioned Lemmy on Mastodon and some people noted some controversy surrounding the “main” instances. I don’t know exactly what concerned people, but I definitely think that more bigger, possibly saner instances like beehaw.org and—hopefully—now lemmy.one can make a better first impression on users.

Also, federation with non-Lemmy platforms seems to be much better than it was last time I looked at this place 6-12 months or so ago.

You might want to check out !lemmy_support@lemmy.ml for asking questions, and !lemmy@lemmy.ml for reporting bugs and requesting features :)

Mods available to be added?

Not sure what you’re asking here? About creating communities (subreddit equivalent) and adding mods for them, see my comment here: https://lemmy.one/comment/536

You can collapse comments, it’s just not really intuitive, click this button:

No downvoting on lemmy.one:

Downvotes are disabled on this instance, because it is a very small community. If you see something against the rules, report it. If you see something you don’t like, go find something you do like and upvote that instead :)

I may consider changing this in the future.

If you have more questions about this instance, lemmy.one, generally, you can also ask at !meta.