Make a plan of how you will set up your dorm room and exactly how much storage space- clothes, cupboards, drawers- will be given to you.
If you are moving to UCLA, for example, you will see a lot of the Californian sun, so you won’t need to stock up on sweaters and scarves and can afford to give some away.
The next reasonable step is to make a list of everything you need to take with you and of those things that you will buy there- clothes, study materials, bedsheets, snacks, etc.
Don’t be afraid to ask for help
You may be looking forward to living independently and being responsible for yourself, but don’t shy away from taking help from your parents.