White front plate should be grey. Maybe shadow it to give the impression it's coming out from the head.

Maybe create a layered effect (produced with shadowing) with the black plate so it's more like a 'visor.' Dark around the edges, and lighter towards the point where the light hits it.

Need to clean up the shadowing above the white plate.

May I ask what your inspiration/reference was?

Pretty basic texture (nice for your first attempt.) Would be nice to see you work on the back and top of the head.

I have some difficulty with the rear of the texture

My inspiration was a drawing done by hand

and these constructive criticism will help me in close, because that I already sold; s
but thanks for the help

What soft are you using?

It's possible to flip the head around, so it's easy to edit the back.

I use CorelDraw
which program you indicates me?

Cents,
Coreldraw is a vectorial program, You can achieve a good quality with it doing a hard work, it's tools dont work good for textures or painting.

Try Gimp, it has great tools, it uses images made by pixels,
many other features of photoshop with it and for free.

Other is photoshop, a good program, with everything you need to do the most high quality texture, but it is paid.

The rest I have already seen people using are just like gimp or photoshop with less features.

for textures this programs are good.

I make the textures in Corel because already did some courses Corel
but I am a layman in photoshop

hmm, not bad for first..

thank you very much man (:
I do another

Well, it's kinda simple, but everyone have to admit, that's so cool and since, first?
You obviously started very well. Please, listen dengue, it can help u.
8,6/10