So... Have you got an enclosure for it yet? Unlimited fresh hay? Remember not to overfeed it, bunnies get fat fast. When it doesn't eat it's really thick diahhrea looking poop it's a sign that it's too fat.
Keep in mind you'll have to clip his nails too, seeing as how it will probably run on soft surfaces most of the time. My old rabbit really enjoyed being brushed with a hard brush, and this is also handy for getting all the hair he will lose around summer time out.
I'm still pretty sceptic as to you raising a wild bunny without trouble, but I guess it might work because it's pretty young.