On moving out anxiety/moving out tips as an autistic

I have not been officially assessed for autism, but it runs in my family and I have been asked/told that I was autistic by all my childhood friends, family, and several coworkers. I am a college student (20) still living at home, and I've never moved anywhere before. My sister is moving out of her place at the end of September/early October at the earliest, and her roommates have agreed to have me live there with them in her place. I'm really nervous. I'm afraid that moving will cause me to crumble, because I will be in an unfamiliar environment, around people I don't know very well, and I might end up being an awful roommate because I swing from obsessively cleaning to having no energy to do anything and I keep odd hours. Does anyone have advice on moving out? How do I deal with anxiety over such a big life change?