So what would it take to grow one plant? Just to try it out. Just one plant inside. Any information I could get would help.
Light! Putting it inside a window isn't enough, or too much. Remember, to make it flower it has to be close to 12 hours of light and 12 hours of darkness every day.
On top of the advice above, I'd say patience should be added as well as secrecy. You're not licensed to grow right? So better be stealth about it and let no nosy people know you're growing even a single weed plant. Weed is just like other ordinary plants. They're even stronger than most plants that is why they called weed. So go ahead and just do it. Keep it simple and sweet.