Should i listen to the shelter? It's been a week and he's so curious about what's outside. Everytime someone open the door he tries to rush outside like crazy.
I'm sure they mean to keep him in the room when you aren't there to watch him! For young kittens, I suggest having a litter box in every room, but at 8 weeks, having one on every floor the kitten spends time on is fine. He is a baby so you need to watch him like you would a baby, but if you bring him out and let him explore with you watching him, that will be fine. When you are out or busy doing other things and cannot watch him, THEN put him in his room. As for litter accidents, just show him where the box is by putting him in it, and that is usually sufficient. The only litter box accidents are in huge houses where there is only one litterbox on one floor, but three floors to the house. Kittens are like kids, they don't think ahead about using the toilet and when the urge strikes, they need to get there fast.
Only confine your kitten to one room whenever you are not at home. This minimizes any litter box accidents and any mischief the kitten may get into (and possibly hurting himself). Make sure the room itself is kitten-proof.
2 months is a long time and your kitten may not need to be confined for that long. I kept my Aby in the bathroom for about a week before I left him have free access to the rest of the place. My rescue cat was in the bathroom for even less time. It depends on the kitten
If you have stairs, place a litter box on each floor of the house and make sure your kitten knows where the boxes are.
Before you give your kitten free access, kitten-proof the house as much as possible. Put household cleaners in a closet, put blind cords out of reach, put plants outside if possible (some common household plants are toxic. The ASPCA web site has a list), put Human medicines and vitamins and other items in a cabinet, keep the toilet lid down to prevent ingesting of toilet cleaner residue (and drowning), etc.