There is an old saying “no pain, no gain” and I’m sure you’ve heard it before. Yes it hurts when you’ve done nothing for so long but it feels so damn good when the pain goes away, you’ve got more energy and you feel better. You mention your breathing is an issue! I presume you’ve had whatever it is evaluated? If you’re debilitated it takes a long time to get back to neutral. You need to find a motivating factor to help you move, for your own sake.
Concerning surgical correction of osteoporosis as an idea makes no sense. Osteoporosis is the gradual demineralization of bones over times and common to some older adults and unfortunate younger females who women who were surgically sterilized and ovaries removed too. The medications doctors prescribe for osteoporosis are meant to stop the demineralization further and help rebuild bone where previously lost. Exercise is conjunction with medication are recommended ways to combat osteoporosis, not surgery.