Tutorial stuff isn't worth putting on a portfolio because it doesn't show creative direction - it simply shows that you can perform a task when handheld, and therefore may have gained technical knowledge from it. Technical ability is only half of the job, you need to be creative and show lots of your own, high quality…
As Mats pointed out, as a general rule you shouldn't put up work that was created via tutorials on your portfolio. The point is to demonstrate what you're capable of on your own.
It looks like you have taken the mesh from this tutorial as well http://eat3d.com/texturing Fair enough you credit that and all but when it comes to portfolio work it should all be your own stuff.
stop using models from tutorials, nobody will hire you if you show other peoples work. if you had remade the character yourself from scratch it would be different... that would be considered fan art and you would have your own style into it, but actually using someones low poly, normal map etc. seems like a huge negative…
Just to start off sculpting is a valuable skill for any artistically creative discipline in the 3D Industry. Definitely have a look at ZBrush as it's probably the most robust, and most used. There'll be some good start-up tutorials on YouTube, and DigitalTutors stocks a decent ZBrush series that I used to learn the basics.…