Yes. A purposeful life is intentional and thoughtful. It does not trip on small stones but carries them along to create a more resilient walk to the destination.
No… Find happiness in the journey not the destination… That way you can fulfill your purpose and not your purpose fulfilling you.
Good question. I think it is up to you. I believe you find your purpose and you start to live that purpose out because it is who you are. You don't need to put the pressure on yourself to find it, for you are your purpose and will naturally live it.