Hi Liamwilo.
Unfortunately, I don't have very good advice for you. What I can say though, is that it's actually good that you're aware of the fact that you'll likely face difficulties at college before you jump in almost totally unprepared.
There are some folks here (myself included) who are in college now, or have finished. Some have advanced degrees too (masters, PhD). So I can share some of my experiences as a struggling college student with you.
I wish I knew much earlier on in life that I am autistic.
I am older than you are, so I have a lot of experience (mostly painful) as a college student with autism. I am not suggesting it will be painful for you too. It was so for me because I had no idea I am autistic.
I was also diagnosed with ADHD just a couple months ago.
It has taken me 18 years to finish college. I graduate this month.
I wouldn't wish what happened to me on you, or anyone else.
I accept who I am of course, but the last 2-3 years were extremely confusing, painful, frustrating, depressing. I'd been in a constant state of anxiety. It got to the point I was getting a lot of physical ailments and just feeling overall unwell. I'm only in my 30's I shouldn't have been getting physically unwell as frequently as I was, especially since my family health history is pretty good, and all my doctors over the last few years have seen no major issues in anything in me (like blood pressure, all my blood tests come out perfect, I've got low cholesterol, I'm not diabetic, etc etc etc you get the picture. I'm healthy lol)
I burned out multiple times over this period. This most recent one, through which I'm still struggling, I was hit particularly hard, and I pretty much returned to exhibiting my much more strong and noticeable autistic traits from childhood. It's debilitating now.
It's like my brain has locked into this mode where it just doesn't even consider doing anything anymore but what is safe, familiar, and comfortable only.
I am not familiar with this strange rigidity. It was always there. But it is unfamiliar nonetheless, because I did everything I could to mask everything and now I am paying the price.
This rigidity is not altogether terrible; it is the natural state of my brain anyway. But the fact it just happened unexpectedly, and at the most inopportune time (the very last 2-3 semesters of college!), well... needless to say, I am in a very weird place. Most days I don't know what to really do with myself.
On top of all this, I have a child with ADHD. And she's in the middle of puberty. *sigh*
I wish you the very best in trying to figure out what is right for you. You are young, and you know you are autistic and you know that you will struggle because education systems really suck and are not good for autistic people.
But you know, so you can prepare. And you can seek advice and support from the right folks instead of jumping in half blind, like I did.