Hey aspirant, Need not to worry. If your 11th is gone and 12 is approaching then that's okay. For the preparation of NEET now it's the high time for you. You need to start working really hard to crack NEET. Firstly let me tell you that 60% weightage is given to class 11th and 40% to class 12th in NEET. So think accordingly. NCERT is the core of cracking this examination. Go thoroughly with NCERT and then try to solve the competition books and Model test papers. With true dedication and strong will you would achieve your goal

Hope this helps

Good luck