Question about keystone online homeschooling in california?

I am thinking of moving out of my public high school and attending a online high school. I heard keystone is a really good online high school and I would love to attend it. I am pretty self motivated and I want to take cles in my free time like tennis or art. Or both. And I was just wondering if its too late to join keystone? Because its february... Or does it really matter of when you enroll? I'm thinking of enrolling ASAP, maybe at the end of february. If you are currently attending keystone online high, then please tell me the pros and cons. And if I could enroll right now? I am in 9th grade and i am in my second semester, my school is a year round school so i get off at the end of february.