You choose wiiu.guide for modding your WiiU, but come to GBATemp to ask questions? lol.
Why choose wiiu.guide and then come to GBATemp to ask questions, when you can just follow one of the guides on here?
I ask that question because wiiu.guide doesn't get updated that much, and a lot of people have bricked consoles without backups because of wiiu.guide.
Kafluke's Noob Guide (Link in my Signature) is always being updated by Kafluke himself, so his guide stays up-to-date. There are more guide on GBATemp too
that are all updated and very easy to follow.
If you really want to install and run CFW on your WiiU, please read through the guide over and over to make sure you understand everything your about to do to your WiiU, before you even touch your console. And if you read through the guide and still don't understand something, then post on the forum and someone will be happy to help you with what ever you need or don't understand. Thats why GBATemp exists as a forum website, so the community can ask questions, so we all can learn more about what we are trying to do, and to share ideas.
Just don't do what 99% of the people did that bricked their consoles, read the entire guide over and over again, don't overlook anything. Make sure you understand everything about what your about to do. And like I said, if you dont understand something, post your question on the forum, we will be happy to help you.
Also, most guides recommend at least a 32GB SD Card so you can backup your WiiU, just incase you do brick your console you can restore your WiiU with your backup using a Hard-Mod. If you don't backup your console, please don't come crying to us asking for a magical solution to restore your bricked WiiU without a complete backup.
Good Luck!