LePetite, taking a look at your photo I have a few recommendations.
1). When you go out get some vertical-striped dress shirts, don't know if rolling up long sleeves would look outlandishly weird with your climate - its a good idea up north but short sleeve would work all the same. Have some leather dress shoes when you go out as well, not like shiny black ones for a suite, more like something business causal.
2). Get some nice designer jeans and even some dress pants, if you want to do something crazy that would actually be kind of stylish - get the black and white checkered "old man" pants from a thrift place; you personally would look pimp in those.
3) You have glasses, I think this is a point that you could really use a lot to your benefit. I'd say spend a whole day or so, or even up to a couple of weeks - shopping online, around town, wherever you can, trying to find the perfect frame. The frames I'd recommend, for your purposes, are the ones that project a bit of that "I'm an a**hole" vibe - I think you know what I'm talking about. Of course you'd want them to fit your general personality a bit but be somewhere 50/50 between you and between the a**hole look (and of course you don't want them to be real loud or gaudy, something subtle but tasteful).
On a non-fashion point work on mannerisms. Look around, try to figure out how guys who are more virile are feeling on an internal level, maybe if you really want to try and figure out where those feeling come from and if you authentically felt them what would be the past experiences and things of that nature that pulled it all together for you. Just saying that while working on mannerisms and faking it to make it can work for some people, when you have AS and particularly overload problems its frankly a bad idea - try to change up your emotional paradigm as best you can to naturally fall into the right zone, don't make up points on reality but just try to view it from different perspectives just like you may want to keep trying to view yourself from perspective and vantage points that you haven't already (not random stupid stuff of course, just something you think could add to you). It can take years to really shift yourself in that direction and come off as an adult from the inside out but it almost takes incinerating your innocence and then returning to being an authentically good person but in a fathering capacity and as a man rather than a child - I know, it sounds weird and extremely cerebral, and yeah when you try to blaze up your innocence I'm not suggesting you get yourself thrown in jail, but you do have to work a lot of these things from the inside to change them and it seems like its the only way to take direct charge or command of the situation.