Good first steps, googley, making a list of what you need to do. Just tackle things one at a time. I've got a complicated weekend (something both Saturday and Sunday I'm responsible for) and I'm just making plans and working on my lists and adding things as I remember them or they come up.

Congratulations though on being accepted! That alone is good, even if you can't start as early as you would like because some things aren't ironed out yet. I'm sure you'll get a notification from the school itself soon or you can make that a first item on your list; wait a week and call them ask them shouldn't you be getting notification, etc. Could be the school has some info on some of the things you need (housing, mental health services in the area, etc.).