Upload & Sell: On
Nice expression, good connection with subject. Congratulations on BW exploration - to me a good BW is much more difficult to achieve than color, but then I have a definite bias for BW
Composition - perhaps more room to right? Lighting of sand is eerily similar to that on the subject - my mind wants some separation in those tones - unnatural and not what I expect to see (but maybe that is just me).
I agree with RustyBug re complexion. See circled areas on forehead, cheek, etc. Perhaps a stylistic choice - to me, overworked. Eyes and mouth are soft.
Plane focus appears to pass through sweater and arms, not his face. DOF could be that shallow if lens was wide open.
<edit> Looking again, his forearms and hands appear to be well in focus - how many and which focus points were you using? Dynamic with closest object might produce this result.
Movement of head? Shutter speed?
Exif isn't available - conversion method?
And my sincere apologies - Welcome to Photo Critique. I think you will find this a congenial group with an interest in sharing and helping each of us grow in our craft. We are all here to learn.