Hey Mr. Burns,
Welcome to the forum. It's great to see new people with snakes!
First bit of advice that could answer all your questions is buy the Cornsnake Manual but Bill & Kathy Love. Great book, lots of pics and great info!
Advice on feeding... hmmm... for hatchlings feed them one pinky about twice a week. If they're not eating I find it helps to dim the lighting a lot and cut the pinky's head open when feeding. Also take it out of the enclosure to feed it, maybe use a separate container with no substrate to feed it in. I do just use the floor though, some baby's like to be in small spaces while eating. The open floor can be overwhelming for a baby.
As far as handleing after eating. I don't know if I would suggest handling after eating for the first few feeds, but I handle my corns everyday, if it's eaten, if it's shedding, regardless. you just have to be very gentle and slow and careful. If they seem to be getting a bit skittish then put them back, that's when they're starting to get really stressed. Handling them is how they get used to you and the more you handle it the more it'll be at eas when you handle it.
Advice on behavior... Well, they're super gentle creatures. Very calm... they do seem to keep to themselves though in the cage. I think the most important thing to keep in mind is that your corn know's how to take care of itself better than you do. As long as you provide it with the things it needs (good heating gradient, fresh water, food, clean cage, hides...) it will do the rest.
Don't worry if it doesn't come out durring the day, they come out at dawn and dusk and chances are it will be up while you're sleeping. Your corn will drink it's water and just because you don't see it doesn't mean that it's not drinking it. Don't worry if your corn spends too much time on one side of the cage. It knows what it's doing as far as heating/cooling itself. If you pick it up and you think it feels cool (temp), then it's probably just cooling itself off. If it needs to be warmer, it'll head over to the undertank heater side.
If you're holding it and it poos on you or if it nips at you, don't put it back right away. If it thinks that all it has to do is poo or bite you to get put back in its cage, then it will learn to do that to get you to put it down. If it does this, just hold it for a few more minutes and then put it back.
Well, I hope this helps, corns are great to care for. I love them so much! Good luck with your new corn!