if you have NO experience with this at all i'd recommend you find a friend who has experience and is willing to help you, or just have this one installed somewhere professionally.
if you still want to give it a shot yourself, search on nasioc for the wiring diagram of your head unit and you will probably need line out converters in order to tap the amp into them. i have some laying around from when i had my stock hu if you're interested. you should also read up on the manual of the sub/amp. just do your hw first because electrical stuff can get ugly if you do it wrong.