I am an undergraduate, studying physics. I have studied maths courses like Groups, Linear Algebra, Real analysis, Differential geometry and probability. I wish to get into mathematical physics, similar to what Arnold's book has to teach. But i find it a really difficult read since it's a graduate text in mathematics. Can anyone suggest me what stuff do i need to study before getting a good intuitive picture of Arnold's book. Or any resources that provide a road map, intuitive picture of the maths used in physics.
It is difficult to answer if the question is how to make intuitive the content if that book. The point is that, the goal of that book is just to make rigorous some important arguments and topics of classical mechanics.
A form of mathematical-physics intuition can be developend only after one managed to rigorously deal with all that mathematical formalism.
To be completely frank, that book is not completely rigorous from a strict mathematical perspective, because it avoids some mathematical subtleties which do not enter the physical reasonings. However, Arnold's viewpoint is mathematical not physical.
From your post it seems that you are already familiar with all mathematical tecnology necessary to understand the book. Maybe a more physically minded perspective is necessary.
My suggestion is to try to get acquainted with basic constructions of elementary differential geometry but from a physically oriented point of view. Maybe by reading Arnold's book simultaneously to a well written, physically minded, mathematical text on differential geometry. There is a useful book by von Westenholz entitled something like "differential forms for mathematical physics".
I found it very useful when I was student, though it has some defects (as incomplete proofs).