Hi Leo, welcome to the forums.
I started out by simply reading reading reading. I have done so much reading. Probably 2X as much reading as I have actually doing 3D work. Either way, I started out just by coming across an architect that I had talked to in my previous job (printer) and he gave me some plans for a house and i just started out with those plans. Im lucky that he gave up alot of his time to help me out.
I also had a family friend who did the same and helped me out. After doing a few works I've now quit my job and am building up my portfolio. I've called around the local architectural firms and had a meeting with someone the otherday and have already scored a 40 job per year contract which includes residential, multi-unit and commercial buildings.
It was alot easier than i thought but who knows how it'll go!!
What i would do is take advantage of the relationships you have with ppl that could help you out in any way, shape or form. Start reading! Go
here and especially
here. I would consider buying the books written by 3DATS too. You're in the US, there are conferences and stuff going on like
this one which looks awesome. I would also try and find some sort of short course for plan reading. I'm trying to find one at the moment as i dont have any previous training as a drafter or architect.
Either way, good luck!