B,

I can relate to not feeling having a purpose.  I see this as an inside-outside job.  Inside: get to know yourself, know your values, pay attention what you enjoy – even the little things, be mindful of the world around you, meditate.  Outside: try doing things,  get out in the world, start a hobby, sign up for a “fun” class like a music or drawing class or a woodworking class, volunteer, join clubs or Meetup, etc.

Trying things out will help you get an idea on what interests you.

Mark