Yes it is possible to do so although not mostly recommended because the framework and peer support misses out for preparation. And even if you still want to go for it personally I'd recommend you to atleast buy some good mock series from TIME Careerlauncher etc. So that you can compete like Cat in mock tests with other students of the country.

For self preparation some good basic books to start with are different editions of Arun Sharma. And also go for Takshashila Shikshak YouTube videos. They will help you out.

All the Best.

SMIT-IIM-AMRITSAR-PGP/04