Welcome to the forum!
I have fibromyalsia and am 47 so I know about the pain part except getting hit by a car. I just started a low carb diet a week ago (this time). Have you thought about what kind of meal changes you're going to make? It sounds like you'll have to cut down on drinking too but you can take baby steps
You've come to the right place to start. I used this forum many years ago when a lost approximately 40 pounds. Everyone is very friendly and supportive and lots of information.