Aw I'd love to see a picture. Welcome to the wonderful world of guinea pigs.
Just so you know, guinea pigs are social creatures and live in the wild in herds. They do best in at least pairs, and males do best being introduced at a young age to a young pig around the same age. If you got him from a pet store he may be missexed so you might want to double check that he is actually a male, also watch for health issues (like sneezing, crusty eyes or nose, etc...) as pet store pigs are notorious for having URI's which is left untreated will likely cause death.
Also, males need their glands cleaned (they can get really dirty and cause health problems), so might want to watch a you tube video on that if you've never done it before.
If you haven't checked out guinea lynx or guinea pig cages forums, they are spectacular for learning about guinea pigs.
The mom of: Too many to list now.