What kind of board do i need to buy to learn skating?

i wanna learn how to skate.i know about classic skateboards,longboards,freebord,and penny boards.which kind of the above or any other kind of board should i buy and why?
Update: truth is im more interested in longboards!i just wanna know which board is most suitable for learners
Update 2: im interested in CRUISING AROUND not tricks
6 answers 6