I also started out with film in skateboarding, good place to start, considering the level of acceptability in a skateboard video is nowhere near the level of acceptability anywhere else. sad but true, 99% of skateboard footage is dependant on the person or the trick. for the most part you dont have to worry about matching, lighting, crew, scedules or anything else really besides composition, exposure, and the subject. most people that shoot film for skate videos dont even use correction filters shooting tungsten film outside bucause "duh... the transfer dude makes the color right". yes its sad, but the good thing for me was shooting random short ends, learning, testing, screwing up lots of film, but it was all still useable because of the way video parts are cut (random shots from the previous year or so cut to some music) so it didnt really matter.
it will give you a good base understanding of working with film, which is good.
enjoy the k3!