Lastly, I'm 15 but I have a real passion for music, do you think this is too much money for such a young person?
My desk is pretty small, would the compass 2 9018 be too big or does it come with a long USB cable so I can move it somewhere somewhere else but still have it connected to my laptop?
If you're that young and you love music learn to play as many instruments as you can trust me you won't regret it. So that's what I would recommend you spend your money on.
Learning music and to play a wide variety of things will give you a very deep appreciation for music, especially if you already love it.