Im making a game and i need to know how i know its with camera but i dont know what i should do to change the camera to 1st person Mode.
Please search first before asking a question.
Anways, use LockFirstPerson:
game:GetService('Players').LocalPlayer.CameraMode = Enum.CameraMode.LockFirstPerson;
It must be used in a LocalScript for it to work since it is client-related.