I've come to feel that purpose is fluid, it changes and will change. I've accepted this and allow plenty of space. The thing about not knowing a specific purpose is that it opens you up to pursue anything and everything as it comes along. What makes you happy? What sounds good, what would make you feel happy that you've done? That's a purpose. Make a bucket list, start checking it off. That's my purpose, to enjoy everything and anything I desire to. Life is short and time being stable is also limited. Find joys, I try not to limit myself to one thing and miss out on everything else.

Just a personal opinion, some people may want only one purpose. It's not for me I guess. I've done the whole one purpose thing and all it brought was regrets.

Wish you luck in all that you do, whatever path that may be.