I'm in my 30s, and to be fair, I don't consider it all lost time, or whatever. For example, I studied English for many years at College, and even though I didn't graduate, being fluent in English allowed me to learn a huge amount of things that I would have never had access to otherwise. That is the one skill I developed that gave me the most compounded returns in my life,
I think skills are always important, and in one way or another, you should always be moving forward. But you do need to make an emphasis in monetization and income, to try to achieve a balance. Otherwise life ends up becoming a permanent weird self development vacation that drags on for years.
Also learning all I learn about politics, and the medical system, and what not, lead me to avoid being injected at the beginning of this decade, and that's also a reward that is priceless to me.
At the end of the day we all have our journey, we needed those experiences for a reason, and there is no point in wishing this or that about the past, but maybe someone here reading these posts can benefit from our experience