HI, my question is pretty much just in the title,"How Do I Activate My Scripting?". I'm looking for a way to use my Javascript. If you need any more details, just ask.
Within Unity, the assets menu is where you can start. Assets->Create->Javascript.
That'll give you the bare-bones script you need to get going. The update function get called every frame so, generally, that's where you'll put your logic. There's much more to scripting; I recommend heading over to the scripting guide.