OH MY! The nail gun in the knee!
So sorry! My brother did the same thing when he was in construction.
"Simple Country Boy" as well!

Your situation sounds way more involved with all those surgeries!

I just wanted to welcome you here
There are so many very caring people here.

I think you've already been pointed to a couple of forums here that should help with some of your questions.
Ask Questions! And using the 'search' feature at the top of the page always helps me pinpoint posts of particular interest.....just type in key words....

Good Luck

Rae