Open Lunar Client
Launch Minecraft from Lunar Client once
Close the game
Open the Minecraft folder
Open the `resourcepacks` folder
Copy your resource pack `.zip` file into the `resourcepacks` folder
Reopen Minecraft through Lunar Client
Go to `Options`
Go to `Resource Packs`
Move the pack to the selected side
Click `Done`
Open Lunar Client
Go to `Settings`
Open `Mods`
Enable any built-in Lunar Client mods you want
For external Minecraft mods, use a separate Forge or Fabric installation
Install the correct mod loader for the mod
Place the mod `.jar` file into the `mods` folder for that installation
Launch the game from the Forge or Fabric profile, not Lunar Client