Is it Zbrush?

yes, it is)

Is it hard to use or not?
I have a ZBrush core program installed in my PC came with a Wacom Intuos 3D pen and Touch tablet.

I have a Wacom tablet, it's logical, because I draw, but I like to use a computer mouse when I'm modeling. this is not the first attempts to work in this program. Once upon a time I studied the basics and before I did not know the anatomy so well. to the program it is easy to get used, besides on YouTube there are a lot of lessons. the main thing here is a knowledge of anatomy and a sense of form, the rest is learned quickly enough

just try it, I believe you will)

This is so cool! Can't wait to see what more you make ^.=.^

Thank you. I like interactive 3d, in general everything that allows you to better know the character. in fact, I have many plans for the near future, I hope my innovations will be of interest to many. I was thinking about creating a comic book ...)

That sounds awesome! Comics are fun :3

It's amazing! Turntable it looks even more interesting!

thank you)

This is really awesome! I love how the eyes act like they really would, the light source moving across them as it is turned. The hair detailing is amazing!

thanks) I'm very pleased, I will try to do more)

If only it was marmoset or posted to sketchfab

until the paws did not reach, maybe later I'll figure out how to do it)