I too am a begginer with a K-x. IRA has the right advice, but if you need something to guide you through those kind of exercises this forum(link below) has an online begginers 'course' . It's free, they offer challenges for you to do and then post your results for discussion if you want . It covers the basic stuff, aperture, shutterspeed, ISO etc and more. You need to join the forum to post but you can look through everything without joining. I think it's worth looking at, I have found it usefull.
:New To Photography - AusPhotography:: Australia's Premier Photography Forum::