I want to make the inside roof black... what are some ways of doing this?

I seen some spray cans from autozone for interior "fabric" but im a little skeptical about that =/

 

Look into having the interior done in suede, anything that you do with a spray can will look cheap and ruin the car.

If you don't have the budget just save up, I had my head liner, a pillars and rear deck, it was just under a $500 with the materials and labor, here's the post that I made about it a few years back:
Suede roof liner