training???

Hello, My name is Bob Atteberry, I am 15 years old (16 in July). I am a distance runner for my High School cross country and track team as well as a distance swimmer for the swim team. I was goin to start training for a few triathlon and relized I know a lot about swimming and running but not how to train for running, swimming, and biking at the same time. I would really like it if you would help me out by giving me guide lines for training schedules or maybe e-mailing me a few to chose from and or change to my needs. The distance of the triathlon is a little longer than sprint and not as long as olympic it is, .5 or .6 mi swim 20 mi bike and 4 mi run. It is the HFP series in Ohio. Thanks, bob ([email protected])