Considering keeping pet frog(s)

I have raised about 30 common frog tadpoles (in ireland). They are currently transforming into froglets and I've started to release them in suitable nearby habitat, I've noticed one of the tadpoles is huge, like way bigger than all the others and I'm considering keeping it and maybe 1 or 2 more as pets? Does anybody have any recommendations for suitable style terrariums and terrarium layout etc, and does anybody here keep common frog? Thanks