Preparation after long gap

First of all , have faith in yourself and your hardwork.

Gather all the correct 8nformation about the syllabus acc. To your attempt. (May/nov.)

Start with the subject you feel confident about and seems to be easy to yiu as compared to others. Do thorough study of each chapters and test yourself on regukar basis. Try to start new subject along with first one. 

By this you will have command over preparation and u can follow study pattern for rest of the subjects you like to choose in sewuence. 

But for the ones which requires amendments. Be updated. And practise as much as practical ques. U can. As u have a long gap. 

All the best and justtt believe in yourself and get set go...