Guys please help me with the following subjects how to study?

1. Physiology

2. Medicine

How to study and which source?

I’m really struggling with these. I tried Marrow for Physio and Priyansh sir for medicine

But I’m not being able to solve questions.

Also, is it advisable to do system wise integrated?

Like CVS

Physio CVS, Patho, medicine and pharma?

And complete all systems?