I am in 12 PCMB. I don’t want to continue in science nor arts. What should I choose?

First research and explore the umpteen number of courses which are available after 12th. Then recognize what you are interested in and what you want to work for in future. You can continue with fashion designing, interior designing, architecture, journalism, law, mass media, aviation, hotel management, teaching, commerce courses, prepare for exams etc, but you need to make sure that you are actually passionate and interested in that course, and did not take it by some pressure and negligence. You still have time buddy, science and arts have a vast domain too, surf through all the courses available and choose the one which suits you best.