So how have you been loading Homebrew up till now? Or when you say "new to Wii softmodding" do you mean new like just had your Wii hacked last night.
What you should do is get an SD card, it is very recommended that you have one.
Please tell me which part of the guide you're having trouble understanding so I may try to explain it in simpler terms. I tried to do so when writing the guide in the first place but maybe I could explain it a little easier if I know what part you're having problems with.
Another thing I would recommend is making a post in our introduction section of the forum, someone should give you a long post with links that will help you learn all about the Wii modding scene.
If I spelled something wrong, I'll just blame it on auto-correct :D