You can often find lefty bows a lot cheaper than right hand bows due to lower demand. That said, I would try to shoot some left hand bows and some right hand ones if I were you. Instinctive shooting can be done with cross dominant eyesight. My daughter does it. You may have an occasional issue early on, but that can be minimal.
Changing from right to left can be done, but may not be necessary, especially since you have been shooting a compound that way.
I would say starting with 45# as a maximum would be wise. You will probably not draw 29" with a traditional bow either, by the way. Lighter is better until you get your form ironed out. Aside from the fact that being overbowed can cause form problems, heavier draw weights can also mask some form errors. Also a light bow will let you shoot more without fatigue.
I just bought a 40# bow for form work, and wow, can I tell a difference in my shooting already! Form errors are magnified with the light bow. I still make some, but my groups with both the lighter bow and my 50# hunting bow are shrinking rapidly.
There are a bunch of Tradgangers from MO who may be able to give you a hand too. You may want to start a thread to find some of them, though lots of them will probably be in the woods now.
Oh, and welcome aboard!