Parakeet Help!?

i was going to get 2 get a parakeet soon, and i was wondering of what supplys i need. i know i need the cage water holder and food hlder, and i know i need foo and water too in the bowls, i was wondering if there was a type of food where i would have hardly and messes i heard they are messy eaters. i there a type of food and how would i teach him /her to get onto my finger and not fly away. is there a site that contains both hardly and messes and the type of food or can u tell me? thanx