I think Leucs or Azureus or some other species of tincs would be good to start off with. They are bold, beautiful and easy to care for. With Luecs you could do a group of three to four. Some of those others are more territorial and should only be kept in mated pairs. You are going to have to get rid of the screen top and switch to a glass top to maintain the required humidity levels. If the screen is part of a sliding top you can set plexi or glass into the area to cover it up. Do some research you have a lot of options. But check out those Leucs you wont be disappointed.