No way, you are going to need some height in order to put perches at multiple levels. At least 24" in height. For an adult I would do 36" x 24" x 24". I recently read The More Complete Chondro (in the above link) and it said the absolute bare minimum is 24" x 24" x 24".

For a baby you will want something smaller, they can stress if in too large of an enclosure. Daily misting seems to keep humidity up better if in a pvc cage of tub. For the babies humidity s crucial.

Speaking of babies GET A CAPTIVE BRED ONE, from a responsible breeder. This will set you up for success. Avoid farmed animals, they tend to be sicker and riddled with parasites.