Hello dear student,
Please first of all stop thinking about the time that you have already wasted because that is anyways not going to help you out instead it will give you guilt . Hence you won't be able to study and concentrate. Now it's okay if you have not studied till now . Still you have plenty of time in your hands utilise it . Study ncert and make notes from it . Your school have also provided you with notes . Study them and see for the books your teachers have recommended in class. Solve ncert back exercises after studying the chapters . It not a big deal think that way and utilize the time which is still in your hands. I hope this helps
Thank you and best wishes
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