Judging from your post, you did not read up on anything yet. If I were you, I would leave my Wii like it is because without propper knowledge, you will break something. Wii hacking is not that difficult, but you can't expect to plug some special, modified usb stick into your console to magically hack it (although Modmii comes really close to this). So read carefully through the guide provided in this topic and also study some of the stickied guides, which you can find right on top in the wii section, and then come back.