Failures in standing up from a couch or sofa

 Normal people use both arms to push up from a sitting position to standing. My left arm has zero ability to even get into proper position; the fingers will not open, the wrist will not lay flat, the lats immediately pull the arm to the chest wall. So I have to twist my body so my left cheek is on the edge of the chair, use my right am to push my upper body over my legs and then stand up straight, swaying for a bit before I take a first step with my good leg.  This will become a problem in 25-30 years when I'm not as strong and balanced as I am now. I see NO SOLUTION FOR ME EVER. I should be able to go to ANY THERAPIST IN THE WORLD and get exact protocols to solve this problem.