1. Download forge-1.20.1-47.1.79-installer.jar to any temporary location.
  2. Create a new folder with a name that you like for it
  3. Run the standard Minecraft Launcher
  4. Download Direwolf20_1.20.7z and extract the contents into the folder you created.
  5. Run your new installation.
  6. Select multiplayer and add server
  7. Connect to the server and enjoy (hopefully)