What should I take on next?
I got my Wii playing backup games on FAT32, I got some homebrew stuff going like NES and SNES emulators, homebrew games, mplayer, etc.
What should I learn next?
Just some ideas, you could try WiiMC or MplayerCE media players, test out all the different USB Loaders for Wii games, Triiforce, sneek, learn how to make channels or forwarders. There is probably no end to what you can do.
Thank you and thanks for your guides! I'll check those things out.