I agree with Marcia about finding a better background for your pictures. Sunshine and natural light are much more flattering to make you look healthy and not washed out.
I don't feel that a man needs to have shirtless photos to attract a date. You wont be shirtless on the date, I hope, so why would you need to present that right away at the beginning? Just because other guys do it does not mean you have to do that.
I have read that wearing the color red makes people instantly more attractive, and I have found this to be true in general. A nice red shirt, especially a button up shirt with a collar could be nice for your purposes.
I know this isn't photo related, but if a guy smells really nice that is a huge plus. And not like cheap axe body products for 14 year olds either, an actual fragrance that is for grown ups. If a woman meets you and when she leaves thinks to herself how good you smell, that is a really good first impression.
Good luck!
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Your Aspie score: 165 of 200
Your neurotypical (non-autistic) score: 48 of 200
EQ 12 SQ 70 = Extreme Systemizer