Hey there! Great response time. Ill put my best input out there for you. I am in no way shape or form an expert and fairly new to frogs myself. Although, i have spent months researching =)
Alright well you have the idea! You have a water bowl which is essential in all frog aquariums (just make sure to mist daily and keep that humidity up). And i see he has a little bit of climbing space which is great! I think he/she needs a lot more though. You have a ton of space. Use it all and make that froggy happy! hahhaa. Look into getting some ghost wood. I have read remarkable things about it and i its fairly cheap (12'-16's for like $15us). I would be careful about the light as well making sure not to cook our froggy =).
As for background sheet/image. That would definitely be a good idea to reduce stress on he/she. (Just tape it to the outside)
As for a goal. Remember where your frog has come from and make him feel as comfortable as you can! Your vivarium should resemble something like this image.
Please ask as many questions as you like! And come show us more pictures of what you have done. We'll get that vivarium whipped up into shape in no time =)
Good luck!!!