Yes you can.. But don't do this. And it's obvious thing if you have studied something well (ie 11th and 12th)  then NEET studies have to be done automatically obviously before you go on forgetting concepts. And in 2 months, you cannot develop mcq building skills, these are something which don't develop in a day or overnight, but these are things that you learn gradually and it takes almost 10-16 months for your speed to increase, for you to get a good experience about how to go on in the exam, etc. So my personal request to you is that if you are going well with 11 and 12, then simultaneously solve it's mcqs to get ready for NEET as well or else it will become a problem later.

Best wishes. Thank you.