How can I use the 3rd Person Demo human "Hero" as 1st person contoller?

I am trying to figure out how to go about using the hero character as a FPS. I am thinking, just attach a main camera in front of him, but how do I control him? Thanks.

Edit: I don’t want to just build off of main camera with a gun or hands, because I intend to make the game multiplayer eventually, and need to have a character.

It would be easier to attach the first person controller script to the player model then maybe add some of your own scripts for the walking and shooting animations needed. Attaching a first person camera on a 3rd person player is not gonna turn out good AT ALL.