the thing about fruit booting is that its not that hard... at first. once you start to get good you can step up to some seriously sketchy stuff, and once your feet leave the ground you are committed on skates, no kicking out or jumping off, either land it or eat shit trying. its fun, and it definitely has some parallels to skiing but be warned, fruitbooters take gnarly falls.
i honestly think cruising mellow transition on a skateboard helps more with rail balance.