get a cage that is taller than it is wide. an arborial cage is good. the like to climb so put lots of things in there for him to climb on. 38 gallons sounds good. thats plenty! um lets see. oh don't put a water bowl in there. just mist them down the collect the water off of they're nose. and make sure that you mist the cage often, mist the walls, plants, and everything within the cage... they drink the water off of that too. feed crickets and yeah! good luck hope hes cool!
P.S. you can put a water bowl in. but they wont drink from it. mine never did. mine always drank off of the leaves and stuff. good luck!