feeding the mouse wet-ish is ok as long as substrate doesn't stick to it, ie. feed in a seperate container or on the newspaper substrate in the viv. Dont handle the snake for two days after feeding as it will regurge & if not already stressed now it will be after. This will lead to a snake not feeding & becoming ill. You have to remember these are secretive ambush predators. Especially when young, these snake will not tolerate excessive handling & yours has only just began to settle in to it's new environment. This is basic husbandry knowledge & you need to understand the effects you & your behaviour can &/or could be having on your new snake. while your letting your snake settle in you can always read up from books or on the net as much as you can. This will be extremely beneficial for you & your snake. If you find that boring then reptiles aren't for you sorry. I hope you understand what I'm trying to explain to you & that you dont take it the wrong way. I'm not trying to say your stupid or anything but obviously excited about your new snake which is understandable.
Good luck keep us updated with you & your snakes' progress.
I agree with matty18714 and blackecho he needs time to settle in. Re. feeding I sometimes defrost the mice overnight as corns are also opportunists and would eat recently-dead rodents in the wild, but i make sure they're not somewhere too hot.
cornsnakes, ratsnakes, bullsnakes, boas and day geckos