Welcome to the forum

Ok, first measing skins doesn't really work the skin stretches so it's longer than the snake. Try this

try scenting. If you want them to eat fish, cut up some worms and put them in with the fish. If you want them to eat pinkies, cover the pinkies in worms slime. (rub the worm on the mouse). Just make it smell like "food".

Don't feed crickets. They won't eat them anyway. They can't digest the exoskeletons even if they did, and it can kill them..

My snake just went off food too. It's normal. It may be a month before he eats again. Just keep offering food, every few days, and he'll snap back in soon

Don't worry about them biting you. It doesn't hurt at all. you probably won't even bleed. If they do bite you, try not to jerk away or you can injure their teeth. You need to hold the snake, and he'll get used to you. Forget the clothes hanger. Trust me. he's too small to do any damage..

Good luck with 'em, keep us posted.