Hi Manoj , its very challenging to you to study for AIIMS MBBS in 2 months. But it is possible if you are ready to work hard. Every students has a different capacities of working time and understanding capabilities. You know yourself very well so make time table according to that. You should have to spend minimum 5-6 hours daily for self studies. Make a list of topics and try to study them practically. Understand every concept then go forward. Solve previous year question papers as many as possible. 

I hope it will help.

Thanks.