for the 1st is pretty decent i like the hair is very nice and u just need to learn how to work on gimp to make better eyes and mouth and add some effects to the hair and u could make a nice head
You could do better.
When you start to do a head texture dont expect it to be ready just in couple minutes.
Give some time for it.
As my first head texture took some time and it isnt even ready yet.
If interested check this.