How do i start a dance and acting career?

I'd say stay involved with drama at school. Get involved in local productions (is there a local theater program near you?), or school productions, or see if any local acting companies have summer programs for young people. Even if you end up with a supporting role or crew role, take it seriously and learn as much as you can about it. Dance and voice lessons are great, too - many theater roles require you to be able to sing, dance AND act. Any kind of dance is a good idea for you - whether tap, hip hop or even ballet, any of those classes with instruct you how to move your body on stage. Yoga is great for balancing the body and mind. I'd say get involved in as many area programs as you can for young actors.