All going well, you have a Wii that has already got homebrew on the home screen.
Simply insert our SD card into your wii and turn the wii on, as normal wait for the wii to display the home screen and then click homebrew.
You will be presented with a list of programs and emulators that are on our SD card
Now from here follow these instructions to get Emulators on your home screen
And these instructions to get individual games on home screen