May be rescuing Brazilian rainbow boa- tips?

[Arirang]

Hello, all!

One of the many benefits of having a selfie of your snake on your face as your online dating profile picture is the fact that people want to re-home snakes to you. You don't get many actual dates, but really, who wants dates when you can get free snakes?

The owner doesn't seem to know exactly what it is (he called it a Brazilian python, and I just assumed he meant rainbow boa- I didn't want to ask too many questions lest I annoy him and not be able to rescue his snake), but it seems to be poorly taken care of (by his own admission; apparently, it was his ex's and he's just holding onto it until he can re-home). Heat rock, no hides, a tank that seems too small if his measurements are correct. No routine for feeding. Perhaps overhandled, though apparently docile. He doesn't seem to know what the "handler", as he called her, is feeding it.

I just want tips on how to do this properly for the snake. It may or may not be a Brazilian rainbow, so more general advice is needed, but species-specific is also welcome. I have care sheets, etc.