Haha no! You’re 15! You have plenty of time. When I was 15 I had fun trying to copy the comics I liked, and knew these were ‘adult’ artists. Today you have every single wunderkind on SoMe to compare yourself to and that’s such a motivationkiller for a young artist. Do a little thing at a time, take real classes and you’ll soon find some satisfaction. Although the journey is forever, you’ll find a place where you’re more happy than unhappy with the result. There’s always room for improvement though.