Anecdotal, but I had this problem for many years, I stuck to my existing (small) social circle which included no single women, and that social circle got increasingly small over the years as people moved away, settled down, etc. I moved somewhere where I didn't know anyone at all, and after a few months of just spending every waking moment alone, I just started going to the same place where people are and doing the same thing every day.

I think all it takes is going somewhere where people are and being friendly, somewhere that doesn't include existing friends and acquaintances, just sticking with it and not really caring who thinks what about you. Anywhere but a bar would be my criteria, and ideally not a commercial establishment. For me it was the local swimming pool in my community.

Would you be open to advice? Regardless I wish you luck in your endeavors.

Yes, I welcome advice and would be happy to reflect on it.

I found myself in a similar boat until I started doing something that had a high community dependency that is also less extremely gendered. So, for example, biking and hiking are not gendered activities and a variety of humans do them. Foodie things, business things, specific crafts will also do this. Consistently appearing in them helps a lot. This is dependent on how “evident” your autism is though. There is a good amount of therapy that can be done to mitigate some of it, but there are also groups (fandoms for example) that are both less obviously gendered and also more open to awkwardness (like writing fantasy novels). Once you’re in an activity for the fun of the activity, friendships and the like also tend to form organically, like sewing seeds in a field and then allowing rain to trigger sprouting.