Install Minecraft Java Edition
Download and install a mod loader like Forge, Fabric, or NeoForge
Match the mod loader version to your Minecraft version
Download mods from trusted sites like CurseForge or Modrinth
Open the Minecraft launcher and run the mod loader profile once
Locate the Minecraft mods folder
Place the downloaded mod files into the mods folder
Launch Minecraft using the mod loader profile
Check that the mods appear and work in-game
Keep mod versions, loader versions, and Minecraft versions compatible
Back up your worlds before adding or removing mods