Much more chill than I did when I was under the impression that I had a grand scheme laid out for me.

There's a metal song by Parkway Drive called "Horizons". I'm sure the "actual" or intended meaning is different than my takeaway, but my interpretation of its message is that it's unhealthy or detrimental to believe that life has a meaning, that you're meant to leave this huge lasting impression ("masochistic / to think this would be remembered / sadistic / perpetuation of stagnation" "the marks I've left upon this world / will wash away in time")

The lyrics can sound pessimistic or depressing, but as with a lot of metal the tone and melody help set the mood. The song begins sad sounding, but ends with a sound of more blissful acceptance.

Tl;dr: worrying about what your purpose is in life will only help to assure you live a less meaningful life than we are already all destined to live.