Newbie needs help installing amp and sub?!!

hey guys this will be my first time attempting to install an amp and sub in my car...right now i pretty much know nothing about electronics.....i have a 400W 10" sub, and a 400W amp...everything else is stock and its going in my beater 97 mazda 626. Well i unhooked one of the stock back speakers and hooked those wires to the sub..That works, just sounds the same...now time to hook up the amp so i can get a little beat..i dont care if its ghetto rigged or what, i just want it to work. Well it looks like a engine wiring harness theres so many wires coming out of the amp. We have 2 power wires, 1 ground, 4 speaker wires, a small green, and then there are the input wires that plug into the amp like LF,LR,RF,RR. I need help!?!!?!?!
i dont even know where to begin really
will this even work???????????
any help is appreciated

thanks that helps alot...last night i had it grounded, power wires hooked up, and speaker wires hooked up but the light on the amp never turned on so it wasnt working..i will hook up the RCA inputs to the speaker and the blue wire to anything that gets power when the sterio comes on correct?? also this amp has 4 speaker wires coming out of it, and i only need to use one, what do i do with the other three?