NEET is the entrance examination for admission to MBBS,BDS, Ayush and Veterinary courses across India. So to be eligible for NEET, you should have completed your 12th, passed in all subjects and secure a minimum aggregate of 50% in Physics, Chemistry and Biology. It is 50% for General Category, 45% for PWD and 40% for OBC,SC,ST. Now if you belong to OBC Category, the Category you belong to should be also listed in the Central OBC list. Or else you will be considered as General Category and so you have to secure a minimum aggregate of 50% in Physics, Chemistry and Biology. This 50% is inclusive of the Theory and Practical marks scored in Physics, Chemistry and Biology collectively. You needn't score 50% in Physics, 50% in Chemistry and 50% in Biology separately. You need an aggregate of 50% or 40% depending on your Category as an aggregate in Physics, Chemistry and Biology. And along with Physics, Chemistry and Biology, you should also have studied English as one of the core subjects in your 12th. If you are still in your 10th, you should concentrate on NCERT books and learn the basics well. Because you have 2 more years to prepare and appear for NEET, the syllabus will be reduced next year. Which means any plans from now might be too vague. So stick with NCERT books. Once the revised syllabus has been announced, you can prepare accordingly.