my advice would be to ease your way into acting; like actually joining a group and performing. Don't jump in too fast because you may find the social anxiety and such to be stressful (though that might not be the case at all with you). If this is a passion its something you want to cherrish and help grow. In my opnion that means developing it at a sustainable rate, and giving huge credence to the small steps you take towards it. Also, if you can, be wary of the idea of becoming a 'really super good' type actor. If you already have that idea in mind when you haven't even had any experience what so ever, the pain of not performing well in some of your early tries could make you feel like it was a completely dellusional endeavour in the first place which is completely untrue. I don't know about you but for me as an aspie, part of the problem with taking on activities I like is getting attached to a certain image or degree of success. If I feel at all like I can't reach that ideal platform I get depressed, guilty and give up. So good luck and I hope you can find something positive out of the experience.
Most importantly, get started, cherrish the achievements and set it as a long term thing and don't get too ahead of yourself or too impatient.
good luck.