This is very excellent! I don’t see anything that needs changed. Keep up the good work
Hi, Billynae. I absolutely love the lighting and the simplicity of the GFX itself, and the background is stunning! However, I feel like you should experiment with poses and camera angles. A front facing, standing character is a bit too common in logos. Maybe have the character hold an item, such as a coffee cup. Overall, I really love your work. Just keep practicing! 
I do not know much about making GFX, but your work looks amazing! I love how it’s so simple, you’re very talented!