Actually, I do know Jack Osborne. He's a great guy.
But if you still want my input, I've known several people with MS and it can be a fairly slow-moving affliction. At least in some cases, I don't know all of the variables in disease progression.
When I was a boy, (maybe 12 years old), I used to care for my neighbor part time who had very advanced MS. She was middle aged at the time and quite disabled. I'm not sure how long, (maybe a decade or more), since the onset in that case. If that had been my only exposure to the disease, I'd have a much grimmer view of it. As it actually is, I know several people living their lives with MS.
Let's hope that you don't have it, and if you do, it's a mild case. All the best.