I'm 69, and have had to switch to shooting a gun left handed due to losing the sight of my right eye. I'm right handed, and that wasn't to bad, but pulling a bow left handed will be on my weak side. Plus, because of my age I get injuries pretty easy.. I'm just trying to prevent an injury.
I just found out there's an archery club range 10 miles away with a nice 3D range. I'm thinking of just doing the competition shooting with the bow, and continue use my gun for hunting. I could probably use an even lighter bow for target shooting. It will teach me to shoot, and build up the muscles I need for a bow. Then I can move into a heavier bow for hunting later on.