Bit by bit you will learn new stuff and find the use/need for new tools... you will get them and... tada! you will be again a newbie!

If you look at real artists (e.g. the matte painters with Hollywood blockbusters on their resume) you will see that none of them is an instructor for some product: they did not master one product, they mastered the workflow among them and many things not related to programs, like e.g. composition or color harmony.

GIMP 2.7.4, Inkscape 0.48, Genetica 3.6 Basic, FilterForge 3 Professional, Blender 2.61, SketchUp 8, PoserPro 2012, Vue 10 Infinite, World Machine 2.3, GeoControl 2