Aww, he looks just like Federico! <3 I miss him, he was such a dear.
Harrison is a good name. ^^ In my experience with hedgehogs, we got him a small blanket that he liked to curn up in and burrow under, and he had a little plastic ball in his cage he would play with. He also liked to push some of the bedding into his water bowl and would frequently poop in it, so be sure to check for that .____.; Also be careful about letting him roam around on the floor or a table and when holding him, because they pretty much go to the bathroom wherever their at. You can usually tell because they uncurl and lower their backside when it's about to happen. So I'd recomend letting him run around on a large old towel or something and not directly on the carpet.
I had a pair of work gloves that I would use to get him out of his cage, but once I was holding him, I could generally slide them off. He did bite me once, but it didn't really hurt. I just kept still until he let go after a few seconds. He didn't even break the skin. So if you were worried about anything like that, it isn't that bad.
Federico liked a little bit of apple or strawberry for a treats ^^
I know we're allowed to have hedgehogs in Kansas, and while I was taking care of Federico, my Student Nat teacher gave me the number to the vet she used who had helped out with the hedgehog before.
I hope you have fun with Harrison! Hedgehogs are actually fairly easy to care for but lots of fun ^^