Is the right time to start cat preparation or in my case should i shift from my banking preparation to cat.

Hi Sambhav Jha,
There is no right time or wrong time to start CAT preparation. It is better to start now than never. Whenever you start preparation, you will always get better than before, which increases your score to some extent. Start your preparation, give 4-5 hours daily, build a strategy and follow it.
Hope this helps!