That looks nice, especially for being your first! Great job! I love your creativity. I like how you used a reference without directly copying. That’s the best way to do it. I recommend adding definition to the nose and lips and adding some texture to the hair. Adding some more, shading, highlights, and details might help. Keep practicing digitally and traditionally and I know you’ll improve. I can see your potential. I have a thread dedicated to art tips, so feel free to check it out if you want some more tips! You’re doing great! Don’t give up!
Here’s my thread with specific tutorials on eyes, lips, noses, hair, etc:
https://forums.episodeinteractive.com/t/artisticwaffles-art-tips-and-tricks/300674