Not a linux user huh? LOL. Linux can be installed. I was actually going to start a guide on doing so today. Honestly as a long time Linux user their is no way to escape console, learning your Unix commands, having to compile/install yourself, and so forth. It just comes with the territory. Also Linux on the Wii is very limited in terms of memory with only 88MB available, so even a lightweight desktop like xfce is out of the question. I guess X can be installed so you can at least have a window manager but that's about as close as you're getting in terms of a GUI.
I'm thinking it will have to be a two part guide. Installation in the first part. Practical uses and useful programs that will run without crashing or making your system unstable on such limited resources in the second.