satin paint

is satin hard to paint? someone told me its hard and expensive. but i dont know anything about paint, but i wanna start learning and getting into it and use my truck as a guiene pig. anyways, im starting to love the way my primer truck looks at night or in the morning, looks satin.. so i was thinking i would paint it satin. maybe something i could do myself with some practice? is so how is this paint done??