I just installed Homebrew, now I'm stuck...

All right, so I managed to download the Homebrew channel, and I downloaded the Homebrew Browser, but when I launch the browser, all that appears is this:

Read error -6 occured problem

Basically, I don't know anything about this, but what I want is to play my GameCube games and use the GameCube controllers. Also, the aspect ratio is 4:3, but I want it to be 16:10 or 16:9. Can somebody please tell me in detail and no technical and advanced terms how to get this on the Homebrew? Thanks in advance!

Homebrew Browser doesn't function properly because the CodeMii repository no longer exists afaik, so just manually download apps from WiiBrew/another source and install then like you did with the Homebrew Browser. As for Gamecube games, if you're talking about running them on an emulator, we don't support that stuff here. And for the aspect ratio, that can be changed in the Display section of the Wii Settings.