Keep it up. Nothing wrong with traditional. You don't need a wacom to make fantasy art. Look at Scott Fischer, or Vanessa Lemen, if you want some inspiration for fantasy females . Hell any other artist on everyday original.
Then you will need to know mainly 3 things.
Perspective.
Composition.
Color Theory.
Those seem to encompass the majority of the fundamentals for all subjects. But acquiring them takes pages and pages. If you don't have inspiration try to copy an image you really love and do a 'master study' in pencil or whatever you choose.
Get some watercolors if you want to get into some traditional color, its cheap and the fundamentals still apply. Check out some of James Gurney, he does everything traditionally and is a Spectrum Grand Master, and one hell of a nice guy.
Your Work:
As far as your sketches are concerned, they look very gestural. Very fast. So if you are studying something, slow down a bit...to make your observational skills bump up.
But keep your same gestural looseness with your hand if that is what you prefer to do right now.
Get a small sketchbook and do female faces over and over and over again.
