The steps below will help you create a new Save File in Rocket League:
- Close Rocket League
- Launch the Epic Games Launcher
- Select Settings from the menu
- Uncheck the Enable Cloud Saves checkbox
- Launch Rocket league to generate a new save file
- Close Rocket League
- Launch Rocket League
You should now have a newly created Save File. You should not see the opening tutorial again.
If you are trying to solve a Load Failure error in Rocket League and this did
not help, try the next step: How to recover backed up replays and training sequences for Rocket League on PC