This. "I wish I had my teen years back" is giga cope ngl (no offense to oldcels).
How do you know? I've experienced teen years, and I've experienced being old. Have you experienced both?
One thing you should note, is that there are degrees of autism. (I'm sure you've heard that it's a spectrum.) There are autistic people who can barely function, and there are autistic people who can learn social skills and pass for mostly normal. If you make an effort, you might find out that you're the latter.
Also, if you're 5'8", you're still taller than most women. You can just say you grew a couple inches during the summer and fraud to 5'10" and they won't know the difference, especially if you wear platform shoes.
I wish I could be a teen again knowing what I know now. I spent my entire high school and college years focusing on education and career, to the exclusion of everything else, except a few nerd hobbies on the side. I'm diagnosed autistic, and I was the cringiest of spergs all through those prime dating years - not that it would matter, since I didn't try anyway. I also didn't make any attempt at physical fitness through most of high school, although I did pick that up around the beginning of college.
By the time I even thought about dating, I was already out of the best environments for meeting women. Over the years since graduating college, I've learned to hide my autism MUCH better. I'm still not normal, but I can interact reasonably well. I've also gotten more physically fit, and I've gotten cooler hobbies.
But now that I'm older, I'm expected to have a lot of romantic experience, so I have to hide my true social history and fake not being a virgin, which would be a challenge even for a neurotypical. In case that wasn't bad enough, my hair started falling out, too. And don't forget, I missed that ideal window for meeting young women in high school and college.
If I had the presence of mind to focus on the right things when I was your age, I might have been able to avoid this lonely and miserable existence. But while my self-improvements are all too little too late, you still have a chance. Don't blow it by wasting all your time on this stupid forum.