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.