It doesn’t really matter when someone else started addressing their situation.
You are addressing your mobility which is great. Bringing awareness to something which needs attention.
Looking at the whole picture at once can be discouraging.
Break it down into smaller pieces.
Start with the spine first then move to the big engines of the hip and shoulder.

One thing at a time.
Look at where you are now and where you want to be.
Start chipping away at things.
If followed consistently, altering one things at a time adds up to big things.
This is the key to creating what you want.