Click the “Create Custom Profile” Button in the top right and select 1.18.2 for the Version
2. Download The MODS
Click both/one of the Mods buttons on the Ntrepidserver Page
3. Drag and Drop
Drag every JAR file in the folders into the mods folder. the mods folder can be acsessed by clicking on the profile, clicking the three dots, and then clicking open folder.