any airbrush paint to start out with no not house paint
check out these sites
www.howtoairbrush.com ,
www.airbrushhowto.com
the pigments in airbrush paint are ground finer than craft paint making them much easier use espically to learn with
there are tons of places on line where you can purchase DR Martins, Comart, Golden airbrush colors, Createx paints a simple google search will get you a pretty good list
in most case's paint should be reduced so it flows like milk
have fun