ok so if you go here.. www.wiiubru.com
and from the top nav bar grab the starter pack and follow the simple readme guide...
Download and extract the wiiu folder from the release package to the root of your SD card.
It should look like this:
once you have this , you can navigate to any number of exploit hosting sites on your wiiu , mine is www.wiiubru.com
and if all is well it should load the HBL launcher.
try this fisrt off.. im sure others will pop in with other URLs for you to try . most of which are listed here : https://gbatemp.net/threads/the-definitive-guide-to-wii-u-hacking.396828/
.. if this isnt clear enough for you just shout for further help...