I guess I feel that I grew spiritually, mentally and physically during my drinking days. I am better able to utilize what I learned now that I am sober. When I went back to drinking at the age of 40, I think I was as emotionally and spiritually grown as anyone my age.....in most areas. I see this in normies too.
That said...there are areas (not all) where I am really like a teenager right now. And I hope that I always grow and learning new things always makes me feel like I'm just a baby at whatever it is I'm learning...and thats great!
It's called being teachable.
Mostly, as someone else sorta said...why worry...just start where you are