Beginner needing help setting up exo terra

[Texanlady]

Hi guys! I'm totally new not only to this board, but growing orchids in general. I have an exo terra 36x18x36, and I'm wanting to turn it into a completely living terrarium. I want to grow orchids in it, but I also want to house dart frogs in it as well. The problem is I've never had a living terrarium before. I've never grown orchids before. I don't want to introduce the frogs until I have the environment of the exo terra stable. I'm not planning to get the frogs until August, but I'd like to have a fully functioning enclosure by then. So I guess I'm here for help. I've bought several growing orchids for dummies and beginner books, but none of them really detail how to grow in a terrarium like this.

If anyone else grows orchids in an exo terra and could give me some pointers it would be of great help. I have a friend that has one of these, but she just puts her potted orchids inside it. She told me that trying to make it a living terrarium would just be a lot of work, and more than likely everything will end up dying. I don't believe that, and I just can't let this cage go to waste. Since this is such a large and beautiful cage I really want to pimp it out. I'd like to build a waterfall and small pool to house several small fish. I'm just not sure where to start.

Any help would be much appreciated. I look forward to hearing back from those far more experienced than me.