“… I do regret not taking full advantage of them” Knowing how to do so - or even what ‘full advantage’ includes - is almost certainly one of those ‘you don’t k

“… I do regret not taking full advantage of them” Knowing how to do so - or even what ‘full advantage’ includes - is almost certainly one of those ‘you don’t know what you don’t know’ things. Obvious later in your career, but invisible at the time.