This is the #1 cause of failed Xcode installs. Even if you have 20 GB free, the installer often needs double its size to unpack. Aim for 50 GB of free space.
You will be prompted to download specific platforms, such as the iOS or watchOS SDKs. You can choose to download these immediately or add them later in the settings. Troubleshooting Common Download Issues download xcode from apple store
No need to manage .xip files or manual extractions. This is the #1 cause of failed Xcode installs
Use the search bar in the top-left corner and type "Xcode." download xcode from apple store