New... lost

Alright, I just set up my account and everything and it’s saying that there’s no user accounts for the account I’m using and I wanna add one, but, it says that I’ve used all of the users up… even though it says there’s no users.

I am completely lost, I’m trying to log in with my FTP client and I can’t figure out how to do it.

i would also like information on this

trying to get my stuff running.
first time doing this.