If you feel you are weak in science but want to become a doctor, the first step is to understand that weakness can be improved with proper strategy. Many students begin with low confidence in physics, chemistry or biology but build their basics gradually. Start by strengthening NCERT Class 9 and 10 concepts because they form the base for senior-level science. After that, follow NCERT Class 11 and 12 biology sincerely, as it carries the highest weight in medical entrance exams. Try to study small portions daily, make simple notes and practise objective questions to track your progress. Join a good coaching class or online guidance if you need structured help. Giving regular chapter-wise tests and analysing mistakes will slowly improve your accuracy. Becoming a doctor depends on consistency more than initial talent, so even if you start from a weak point, steady effort over one or two years can make you competitive. Stay focused on your goal and build your foundation step by step. All the best!