I can see that you are a person who likes to sketch alot, which is good! I used to be in your position where it seems to be an awkward mix of styles and your not sure which one to go to. I recommend to try shading or inking, or both! A way I've used to help find my style is to simply not draw anything, but something. Just a bunch of curves and lines, and see what you can make out of it! The real effort in that, is to either make a general idea of something through such lines, or to avoid making anything to distinguishable. For this drawing specifically, everything is great, though the reason you may be not 100% confident is because again, it is only in sketch form. Try inking or shading as said before!