Is it easy to get into BITS Pilani, Hyderabad?

I will say it’s not that difficult.
If you have your basic concepts cleared till MAINS level and you have a good command over English and Logical Reasoning then it would be very easy for you.
But, don’t prepare anything specially for BITSAT. Prepare for JEE ADVANCED BITSAT would be easy for you.
You can check the cutoffs of different branch here