I can still remember this my first semester from all these years ago. And when my roommate showed up, he wasn't that great a guy. So, some suggestions:
1) the lonelies are normal,
2) medium exercise regime early to mid in the day,
3) maybe even pre-study a little bit. I like to read or study in safe, semi-public places. And pre-studying can be done deliciously casual, doesn't even have to be your classes. It's just a way of warming up the engines.
And casually walking with a dormmate from the dorm to a store, or from the dorm down to the cafeteria, that seems to be the beginning possible stages of friendship.
And finding matter-of-fact ways with measured honest (briefly) of saying, I'm spectrum and I need a lot of downtime. Or, something to that effect. You do not need to disclose unless it's your own free choice.
Please share your ideas.