Need help installing a CD player and speakers

I just bought a 1992 Honda Civic CX hatchback, and I want to install a Nakamichi head unit and some speakers.. I've never done anything like this before and I don't know how.

Can someone explain it to me? How do I wire the head unit..? And how do I install speakers? How do I take the old ones out, and put the new ones in? How do I set it all up?

I'm a total beginner. Please, teach me.

You could probably search the honda forums and find answers to all these questions. Usually to wire the cd player you need to buy a harness for it first.