You can use the events in the disable manager to disable your own player character - The example below is just a guide for the included player character
Disable Manager Setup
Click the "+" on either the OnPlayerDisabled() or OnPlayerEnabled() to add new events
These events can be anything but in my example, I disable the player, crosshair, interactor and lock mouse cursor.
Examples Below
I disable the FirstPersonController script by selecting the FirstPersonController > Bool Enabled
I disable the Interactor when the player is disabled
I disable the Cursor lock and visiability
I disable the crosshair
I disable the camera zoom
You can then change those appropriate opposite on Player Enabled