Good piece, enjoyed reading the personal aspects — knowing what you know and do not know; felt a kindred spirit.
Gone down a similar path to you Rajeet. A few years older, been there and done it before and returned to competitive running (and some football) mixed with the joys of cycling to savour countryside. Fundamental was being pushed hard, inside and by those around me, in my formative years and this basis of muscle and pyschological (The brain as a muscle) factors stands us oldies in good stead.
Have a read ofEndure: Mind, Body, and the Curiously Elastic Limits of Human Performance https://www.goodreads.com/book/show/41014339-endure — made me learn some more and look again at my HIIT workouts plus return to running just to refresh my mind as much as prepare for one more race — well maybe more).
Yes, to another excess — Going for it.
Thanks for prompts and good piece of reading