Hello,

Online classes are depending on covid pandemic situation dear. You will give the JEE Mains examination 2022. So one hope that everything may be normal in upcoming year.nif everything will be normal then no more online classes are going on. You can go your college and attend physical classes. I'll suggest when you have any doubt in your study ask your teacher, any time I think. Because for online it is quite difficult for teachers and students. You can ask and clear your problem, doubts. They will definitely helps you. Till now you can prepare yourself for examination. I'll provide you a link below you can check it for more details about the examination

https://engineering.careers360.com/articles/jee-main-syllabus

All the best.