Sparkling gouramis, they're fairly small(compared to most of the fish I currently keep they're teeny-weeny, lol) so you can have a number in a twenty.
Welcome! Once things are up and running, balances tend towards maintaining themselves so it's not that difficult once established, but yah, in the beginning it can be a bit intimidating. But it's not too difficult or there wouldn't be so many of us in the hobby.
Again, welcome, feel free to ask questions, we were all newbies once and most of us remember it.
