What should you study?
*sigh*
So here's the thing. If you go back to college, make sure you have a reason. Don't go just to go or because you think it is what you are supposed to do or what people tell you to do. Unless you are independently wealthy, you could be trading tens of thousands of dollars for a lot of cool, but useless, information. Believe me. I know. Anthropology, EMT school, culinary school, and business school. All cool subjects in which I excelled, none of which I currently use for gainful employment.
If you are anything like me, everything can be interesting in one way or another, I can learn just about anything I want to, and because of this, I get bored and lose interest in subjects within a few months. This is
great while you are in school and you have new classes every four months, but when you get out... you just want to do your thing the way you want to, and the world we are forced to live in does not work that way.
So you have two ways of doing this. Fit yourself into the world by finding a useful subject that you like with which you can be gainfully employed in mainstream society and hope that you still love it (or can force yourself to love it) in ten years. OR. Find where your interests and needs intersect and work from there. I suggest the latter, though it is admittedly not easy.
You don't like rules and taking orders, I get that completely. But even the fabric of the universe has unbreakable rules. What you need to figure out is which or what kind of rules are you willing live with. For example. I did not know I was aspie until recently and ten years ago I joined the military. I can tell you right now that if you do not like illogical rules and regulations and taking orders from people more stupid than you, the military and any corporate structure (the military is really just a huge corporation) will not work for you. So office work may be out.
Going into politics may not be right for you, because anything government is ruley, and law, as well, may be difficult. Journalism could be cool, but newsrooms work off a hierarchy, too. You could consider something like a political analyst or strategist. With any consulting work like that you can be an entrepreneur or get into contract work. Less job security but more flexibility. If you go into something like that, though, make sure you go to a good school. The school matters for job placement later.
I like biology too, now that I am older. But I think what I like about it is that it describes the origins of things and how they work. If you are not super sciencey and into math, I'd stay clear.
Becoming a teacher could be something to look into. Not a public school teacher - way too much structure and bureaucracy - but perhaps focus on a professorship one day. That way you can study whatever you want in college with the goal of staying in the academic sphere if that appeals to you. Note: you will still be restricted by the general bureaucracy of universities, but you will be able to research and teach whatever you want. Be prepared for a possible Ph.D. path as well.
Have you ever considered just becoming a writing major? You will have the opportunity to learn several styles you may not have considered already (creative, fiction, non-fiction, academic, playwriting, journalistic, speechwriting). Additionally, a writing major does not restrict you to a particular subject specifically. You could minor in something if there is a field of particular interest.
Listen, I loved my college experience because I just like learning. I am new to being aspie and, looking back I realize that I was attracted to anything that could help me understand humans and society. With Anthropology in undergrad, I came to understand human culture in general and appreciate that there is not just one set of societal rules and that norms are artificially constructed. I also studied abroad a couple of times, which showed me first hand how those norms can radically change simply by crossing a border. EMT work helped me understand how the human body works from the inside and how that can affect the way people are on the outside. Business school helped me understand why America and its institutions work the way they do. And culinary school was just a true interest of mine.
But here I am, ten years after my first college experience, and no wiser as to what I am actually made for and what fulfills me. Really think about it, and don't be afraid to look outside of the usual list of prestigious careers.
How was the college experience?
Social-wise, all of my friends were engineers, scientists, and other geeky-type majors, so my oddities did not stick out quite so much. I still felt like an outsider, but college can be a great experience for aspies because half of what college does is reinforce social expectations. You will need to know how to do this stuff - doing things you don't want to do, working in groups, finding answers with little or no guidance - in order to be an effective member of whatever society you choose to be a part of.
Unless you are able to live in complete solitude or surround yourself with others like you or that understand you (ever think of psychology?), the practical social skills you learn in college will be invaluable.
Additionally, college taught me
how to learn and exposed me to subjects and interests I did not even know existed.
All in all, I would tell you to go to college if you can afford it, definitely, but really give some thought as to your major. Don't go to college first and choose your major later (like I did).
Sorry for the long post. I hope it helps.