Dear Aspirant,

Yes, you can start your preparation from 1st year itself. First of all, you have to check the syllabus of Physics and then prepare accordingly.

Second thing is that you have to be equally focused on each chapter and clear all your concepts. Some of the chapters will be in the second or third year of your course curriculum.

Then after that check out the previous year's question papers in the link given below and see the types of questions you can expect in the exam.

https://university.careers360.com/articles/jam-sample-papers

You can also go for coaching as it will help you a lot and clear your basic concepts and doubts. These classes conduct mock tests and exams to prepare you well for the exam.

I hope it helps.

Thank you