How do i transfer schools without losing a year of athletic eligibility??

I attend scripps ranch high school, a public high school. I live in the area and it is a good school with a good history and scores, but i am very unhappy. It is way too big for me, the cles are too big, the teahcers dont care, and the baseball program is horrible. I am a 10th grader on the jv baseball team. I want to transfer to horizon high school, a private, christian high school in clairemont. How do i do this without haiving to sit out of athletics for a year?