That sir, would be Wake Me Up - Evanescence Ft. Linkin Park
Anyways, not too bad for a beginner.
A bit laggy, but that's not what I want to talk about.
Your scoping is a bit slow. Actually, if I want to base it on players I play with often, it's rather too slow. In a sniper battle where most of them aren't standing still or afk, you have to be ALOT quicker.
You need to feel where your crosshair is, then be able to scope and fire, without having to move your crosshair much.