My saltwater aquarium....need alot of help?

ok i have a 29 gallon tank i wanna kno wat kind of salt do i need for the water because im really not sure and i need mucho help im thinking of getting sand for my fish and im was wondering should i make it a reef tank or rock im want 2 nemo fish in the future so wat would be best and is anomina the stuff nemo fish like is that safe to touch ? and sugestion on easy fish to take care of ?