I wanna be a pilot what should I do after 10th.

Get enrolled in HS i.e. 11th and pass 12th with 70% and above. Then you can apply for Indira Gandhi Rashtriya Udan Academy (the premier institution for pilots training in India). There is an entrance test. Study your 11th, 12th syllabus thoroughly and buy a book on Indira Gandhi Rashtriya Udan Acade

You have to enroll for 11th and 12th after your 10th, as there is no Diploma course in this field, you need to have Maths and Physics as main subjects in your 12th class, and should have passed out. After you are done with it, get your medical class 2 done and then search for your ideal flying schoo