The First Descendant Walkthrough 02: Select a Character 

Once you select a character you cannot change it without deleting your game files. Basically, on PS5, go to Options -- Account Reset -- enter The First Descendant in the box.
How to video: • The First Descendant: ...
Other than that, pick one of the 3 characters and the start the tutorial.
Viessa - Frost Shards | Frost Road | Cold Snap (launch chill) | Blizzard
Lepic - Grenade Throw | Overclock | Traction Grenade | Overkill
Ajax - Orbit Barrier | Void Walk - jump into camp | Expulsion (AOE) | Hyper Cube (dome)
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