Aniket one way to start solving test papers is, just to begin it.

What I mean by just beginning it is- Clear the backlog of fear in your head about solving the test papers or other myths associated with it like “I should start solving only when all of the syllabus gets completed”, etc. etc.

Solving test papers alongside your preparation will benefit you immensely in your preparation since preparation style for entrance exams vary from regular board exam preps. Solving sample papers will keep you tested and will keep pointing your weak and strong areas to you. And you should begin it as soon as possible. Your confidence and comfort level with solving test papers will increase with time. 

You may read about how to solve test papers and why the strategy has proved beneficial for so many, on this article.

How to prepare by solving test papers?

To download previous year question papers or sample papers, and answer keys, click here.

I hope it will help you.

Good Luck!