water does not damage electrics, water damages electrics that are on
because the water conducts electricity if you get it over something like a motherboard you can short everything to everything else and fry potentially any component pretty much, however you might get lucky and dry it out and everything’s fine, usb ports to my understanding have over current protection which if you’re lucky might have stopped a short doing damage, i would recommend taking out the battery (if you can) and the whole thing out, depending on how much water got in it might warrant a tear down and a dry out with the hairdryer but if it wasn’t too much just leave it a couple days somewhere warm to dry and don’t turn it on until your happy it is, then see what happens
unfortunately i cant really advise on what to repair if it doesn’t work as like i say you can be joining everything to everything else it can fry anything but iv had reasonable success in the past so feel free to msg me when you have a bit more infomation