Good start, but eyes seems to me a bit different, left eye is smaller than right one

seems decent.. looking kinda smudgy/ambiguous right now.
honestly seems like there's a bit of work left b4 it's finished.

I am interested to know what technique you use for shading, looks like rough now, keep working on it.

is you wish to do your ears realistic.
I may remind you of ears parts, so you can base your ears out of it.

so far

Nice colors n stuff i love how this goin'
But the ears seems too big and too close to the eyes i guess

the ears must be out of front view and placed somewhere in between the middle and more to the eye, not too much cause front view, so you make a consistent mapping of the ears.

Nice nose by the way.

People ask me :how do you do noses?"

this is a small forehead guy, can be small.
the ears still needs a fix cause of the concha, the ears are good though.
Smooth the shading a bit and you will have a good looking guy.

look for guys faces and try to put values where they are in reference, focus on the eyes too, this will get you a more realistic and appealling head.

I dont know if you will put an iris, but the eyes must have a good look, you need to make a convex shape for the iris, and dont forget the highlight.