Found a brown snake!

[booyabazooka]

Hi! I just found this forum via stumbling upon this thread.

I just discovered what I believe to be a brown snake (photo attached, hoping somebody can confirm this) on my floor. A pleasant surprise, because living near downtown Atlanta I don't see much wildlife other than rats and roaches.

I made a spontaneous decision to keep it, and having no experience caring for reptiles, I'm looking for tips. I temporarily have it in a small bowl with some wet leaves, covered in plastic wrap with holes poked in it, and I'm just hoping he can't get out Looks like off the bat I'm going to need a ~5 gallon tank, a UTH, and some worms/slugs?