These PDF documents helped me to start with blender and gimp, they also helped me to learn other ways to show art. I hope you find them useful. If you have troubles with seeing the PDF, please let me know.
- Gimp Plus # 1: The Gimp Toolbox; How To Use Gimp Tools To Create Stunning Photos.
- Gimp Plus # 2: How To Give Your Photos That WOW Factor. Color and Plugins.
- Gimp Plus # 3: Gimp Layers, How To Use Gimp Layers And Create Amazing Photos.
- Successful Drawing.
- Gimp User Manual.
- An Introduction To Blender 3D (Book for beginners).
- Blender Documentation.
If you work with multimedia design these softwares may help you with your projects. The best part is the fact that all of them are free: