nice start, I am guessing you tried art before, cause you head is better than average first tries at anything.
I dont know what is the tech envolved in this purple strands, You must have seen someone doing it, try to color all the strand and shade, In my opinion it works better.
In a texture, either cartoon, if you want to add depth you need to put shadows and light. Your texture still lack depth, but continue,
the outlines works great