Hello. No need to worry.  Well if you are dropper, that means you have already had an experience of this exam before.

So considering you must have studied before as well about this subject, you must enroll for online classes. This is not only for the droppers but also for the beginners who are going to start their preparation from scratch. The most important reason behind choosing online classes is that during this pandemic, there are many good coaching classes such as Careers360, Aakash academy, BYJU, Vedantu, Turito, UnAcademy .
You can opt for jee main complete knockout package for your complete jee mains 2021 preparation.
The link is given below :-
https://learn.careers360.com/knockout-jee-main-april/

This will help you stay safe at home and will also save your time while preparing very well.

Hope that helps!