Is there a pinned resource for actually using mods, or is the 7 Days To Die modding scene a closed environment specifically for people who want to create mods for 7 Days To Die?
The final game will have steam workshop support according to developers, that should make adding a mod easy.
While still in alpha using mods got much better recently. Many mods can just be installed by dropping them into a "Mods" directory in your install directory of 7D2D. Mods usually have instructions included, especially if more is needed than this simple step.