Well, I can't say for sure unless we get bigger and better pictures but it's likely a northwestern garter snake. He could be wrapping around you for warmth. 80-85 degrees during the day is comfortable for them so if you're not providing heat, that could be why he's clinging to your warm hand.

Baby northwesterns will usually readily take worms, and some will take bits of fish or f/t pinky mice. Don't forget to provide some moist and dry places to hide and a very shallow, wide water dish such as a cottage cheese or margarine container lid. It will dry out fast so keep it filled. A good misting once a day doesn't hurt. Baby garters dehydrate fast. Keeping piles of moist moss to hide under helps too.