ok, I'm new to the world of domains, and I just signed up with 000domains, now what do I do?? Do I get a host with them or what
They do not provide hosting. Most other places don't either(unless they are hosting companies offering domain registration).

www.venturesonline.com - They offer hosting(not free), and I've heard they are very good. I haven't used them, but when I get spare money for a host I'm going with them.