Start here:
http://ball-pythons.net/forums/showt...ius)-Caresheet

and here:
http://ball-pythons.net/forums/showt...ALL-caresheets!

I wouldn't run off and buy a tank, as plastic tubs are much better at retaining humidity.

Don't waste your money on a heat rock.

I wouldn't advise using live plants or even wood cage decor. Plastic plants and hides are easier to clean and disinfect, and live ones tend to get smooshed and die.