Your preset box is blank because you haven't exported any presets yet. To fix it just go to the "Tools" option when you first start the game, then "Preset Maker". Look at the list and you will see a whole list of presets. First one is"Preset 1", then "Preset 2", ect.
Choose the preset you want, then click "Export". When you're at the character selection after you've logged in, click "Edit", then the last tab, and you will see "Use preset". Your exported preset should be there.
As for the preset design, you can make it whatever you want it to be. No need to be detailed with all those fancy brushes, just do whatever the heck you want.
You can find a picture UV guide to the presets in:
C:\FeralHeart\my_presets\reference