I've created a simple tool that allows you to prevent Steam from updating Beat Saber whenever theres a new update without the need to copy files around etc (Link in comments) :
Beat Saber guide - How to create a full body tracking avatar
GitHub - Umbranoxio/BeatSaberModInstaller: Automatically installs Beat Saber mods with a single click
GitHub - legoandmars/ModelDownloader: A PC Beat Saber mod that allows you to download Sabers, Notes, Platforms, and Avatars directly from ModelSaber, all from a convenient window within your game.
Guide: How to Download and Install Beat Saber Custom Songs
Beat Saber guide - How to create a full body tracking avatar