A long time ago, I asked myself,
"What am I interested in?"
"What are my passions and hobbies?"
"What places would I like to travel to?"
Etc.
Then I journaled and answered those questions.
From there, I did things everyday that would help align me to the answers of those questions.
Also, when any experience arrived (Ex: A class about an interest, Concert, a road trip, anime convention, bonfire, etc.), I would just say yes.
It's come to the point that I have done majority of what I wanted to do already even before my early 30's. If I die tomorrow, I will be happy knowing I did whatever tf I wanted to when I was alive. Just gotta overcome SI of course lol