Coming from that place of knowing you are here for a purpose; you're here for a reason; that nobody is on this planet by accident... If you have that as your armor, you can show up as a performer and then see what you bring to the room. That's a good place to be in.
I also tell people that it's really important to have the desire to perform, but also the willingness to do the work. What I mean by work, as any aspiring musical theatre kid knows, is singing all the time; taking dance and acting classes; doing monologues by yourself in your room etc. Whatever it is, do the work and do the necessary self-work too. Get therapy if you need therapy! I love therapy. It's so helpful to go. As actors, we portray so many different kinds of human being, so don't you also want to explore your own healing and better understand the human condition?