I want to say welcome to the forum. I am not familiar with your implants. I would say as far as exercise do anything you can do compfortly. You have healed a long time ago. I'm not sure if at a young age you would be fixed to the pelvis. If you can do yoga, do it.
T10-pelvis fusion 12/08
C5,6,7 fusion 9/10
T2--T10 fusion 2/11
C 4-5 fusion 11/14
Right scapulectomy 6/15
Right pectoralis major muscle transfer to scapula
To replace the action of Serratus Anterior muscle 3/16
Broken neck 9/28/2018
Emergency surgery posterior fusion C4- T3
Repeated 11/2018 because rods pulled apart added T2 fusion
Removal of partial right thoracic hardware 1/2020
Removal and replacement of C4-T10 hardware with C7 and T 1
Osteotomy