You sound very self aware here, that even if English is a relative weakness that you are well able to complete the required tasks, if you had not sabotaged yourself. Which it seems you believe that you have done.

It is absolutely not impossible to reach your goals now. Except perhaps where goals relate to achieving X by age Y, that you might need to let go of. But age/time related goals like this, in most scenarios, should be seen as realistically having very little to do with the actual achievement you wish to make. If you are aiming to be a prima ballerina, it is my understanding that if you do not have a placement in a company by 18/19yrs old, then you probably never will. So yes, there are certain accomplishments that have an age/timeframe attached to them, but this is very much the exception, not the rule.

You are not "too old", it is not "too late", and you are not incapable of achieving great outcomes. You are currently standing in your own way though.

I should have thought to point you at this article earlier:

https://www.davidsongifted.org/search-database/entry/a10421

Do you have any sort of mentor with regard to your autism? Or connection to a community of adults living successfully with autism? I think it would really do you the world of good to have contact with a mentor or community who views Autism in a more positive and supportive light. In Australia the first example that comes to mind is the I CAN network:

https://www.icannetwork.com.au/

Perhaps someone in the US will be aware of a similar opportunity available to you in the USA?

I used to really enjoy Karla's ASD page, she's not been very active for quite some time, but she has some really useful resources and posts that are worth reading.

https://www.facebook.com/Karlas-ASD-Page-155369821204141/