The shadows on her face obscure some of the detail and make it hard to tell what's going on at first. Apart from that, I think everything else looks great! Love the lighting in the room, the background details, her pose. It has a very melancholy feel.
No, sweetie, that's not a question that a filly of your age need to worry about. A young filly like you should go and play, see and learn this beautiful nature that hold everyone in awe and amazement, explore this breathtaking world with curiosity, passion and enthusiasm, grasp every inspiration the Mother Earth has ever gave to you. Sooner or later, you will find your way.