From my own search on this topic:

Science can only do so much with the 'internal' meaning. All people I've read are inadequate or point to religion.

Religions, across the board, sure seems to be solely focused on purpose and meaning.

If you want purpose outside yourself, I'd look to a religion or a group that functions similarly. I dug Alan Watts and the like for awhile. More recently have liked St Augustine and other apologetics.

I know the concept religion causes raised flags but I do suggest that you are least give it an open mind while you search.