Hi Aiden,
I would recommend that you two go through and dry it out as best as possible, and to let it sit for awhile to dry out before even attempting to power it on. Since it's still wet, try removing every component and patting them down with paper towels, and then set them out to dry. You may not get every component to work, but letting them dry out and reassembling the PC is your best bet. I've found desktops that sat out in the rain for a few years that powered on with little issues once they dried out. Good luck!
- Jasen