which things we must know about mbbs for first year and further?

Hello, In terms of academics you need to know the Human physiology and nutrition chapters form your schooling. Being thorough with your 11 and 12 Biology itself may help you further. In terms of  the schedule during your studies you can check out this article https://www.careers360.com/careers/doctor . Medicine students will be trained and guided to suit to the  professional level right form the beginning itself. You will be constantly exposed to hospital environment so that you can overcome any phobias. Just like any other profession the student just need to be willing to do the work and enthusiastic about being part of the field.

Best wishes.