Help on getting ready for snowboarding next season?

i decided i wou;d really like to start snowboarding next season and i would like some help on how i can prepare for it. ive never snowboarded before but i did use to skateboard a whole lot and was pretty good at it. i say that because i heard if you can skate you can snowboard. dont know if its true or not. i was gonna start last season but wrestling got in the way. what can i do in the summer to prepare like what should i be working on in the gym and stuff like that? im going to be going to white tail and i dont want to show up there on of shape and tired in the first run lol