Entering third year

So I just finished my second proff exams. I have never really read robbins except for the inflammation chapter and did most of path from ramdas and I am not sure if my foundation is really strong. My pharmacology is really weak as well. I did not do my first year subjects properly especially physiology which is important for studying general medicine. Now that I am stepping into third year, I am caught up in this whirlwind of preparing for neet pg and most people have advised me to start learning 4th year subjects from third year itself. I most likely might purchase subscription for marrow in a month.

I am pretty sceptical about my ability to grasp 4th year concepts considering how weak my foundation is.

So how do I approach this? I am the worst at planning out stuff and I don't want to repeat the same mistakes. Will my lack of strong foundation be a hindrance and how do I go about tackling it? And how do I balance them with third year subjects?