Weight lifting advice

I hope to get some good advice, I've got sort of a weird problem to start with, but I want to start weight training right after the holidays. I'm trying to figure out some decent weight lifting to do. Now the unique problem I have when I was 12 years old I was in an auto accident and had a severe Brachial Plexus injury, which caused partial loss of usage of my right (formerly dominate) arm. I currently have about 65% usage of this arm and about 55% usage of the hand. The radial nerve in my right arm does not exist (its dead) which makes it very complicated to lift my wrist and fine muscle control is nearly non-existent. I also compensate with incorrect muscles in my back to do most things with my right arm, not something I can control as the body is amazing machine and does this automatically.
Now to complicate things even more, I have an extremely bad back, but it is getting better with the weight loss. But I did fracture 3 vertebra in my back during the accident and it didn't not heal straight causing some scoliosis. This can cause great pain when exercising, which is probably the reason I let myself get so far out of shape to begin with. Now I have learned to deal with the pain of exercising and I can get through that.
But I don't know what exercises I can really do. I know I will be using machines mostly as working with a weight bar is tough. Dumbells are obviously fine.
If someone could give me some exercise advice for weight training with these issue it would be greatly appreciated. Just the names of them would be good, I can research what they are and the proper techniques if I don't already know them.
Thank you in advance.

Congrats on getting motivated to make the effort!!

I think with the complexity of your injuries you really should consult with your doctor or physical therapist regarding what would be recommended. Or at the very least, consult a reputable personal trainer that has experience with injury rehab.

Good luck!!!

Great Advice!!