Welcome
I will give you some advice from a 57 year old who's been there and done that. In fact, I am also a part-time university instructor for the past 30 years.
1. Keep your focus, make your daily task lists and check off lists, don't procrastinate. Autism executive functioning 101.
2. If you're autistic, you'll make all sorts of good acquaintances, perhaps have a good social life, but no real, true friends. Reality 101. Keep things in perspective. When in school, your personal life is secondary.
3. Your university experience will go much quicker than you think. That said, do not allow yourself to get behind. If you can, spend a fair amount of time in the tutoring center, if offered. Sometimes having someone show you some little tricks and techniques and shortcuts can be helpful.
4. Don't let your anxieties make you hesitate and miss out on things. Courage = Being afraid, but doing it anyways. It's a good way to gain self-confidence because you often surprise yourself with what you can do.
5. The first year or two is often the "weeding out" period at universities. It's designed to be difficult. Achieving a degree has less to do with intelligence and a lot more to do with perseverance. All you really need to do is keep yourself within a "good academic standing" and keep pushing forward.
6. Most employers do not look at your grade point average, but rather the degree you achieved and if you passed your board exams (if applicable). Joke:
Q. What do you call the student who graduated last in his class at medical school? A. Doctor.