Hello,dear 

Well,do't worry it's still good ,but make sure next time you will able to score so good , bdw you will goona to drop a year and now you have basic knowledge of all subjects so, your target should be to first start solving previous year question of each topic and where you face problem you should take help of Google , I think it's a best easiest and best , and study previous year even if you study previous year notes or whatever notes you have  you will get to know which topic you are not getting ,so firstly start with inorganic ,first study from notes take out previous year iit-jee book and solve Ques. Inorganic will give you confidence , and be self motivated always if you not able to solve don't worry see the problem , and make it clear so that if you face it next time you will able to solve without hint.

Visit the below , it' an article about preparation of jee ,it may help you

https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-2019/amp

all the best!!