Put water in the base. Put shisha in the bowl. Wrap the bowl with foil. Poke a bunch of small holes in the foil. Put one of those charcoal things on top. Light the charcoal. Wait a few minutes for it to heat up. Smoke away.
You may be best going to youtube or somewhere for the mechanics of how to use a hookah and come back when you're ready to start playing with your own blends for it. Its something that may be best observed rather than described.