Question

Is the frame of reference when earth is revolving around the sun?

Answer 1

No, for several reasons:

There is no reference frame of "the planets";
The reference frame of an individual planet is non-inertial
One of the planets, Uranus, has an axial tilt of about 98° giving the Sun a peculiar motion through its sky;
The planets do not orbit the Sun – they all orbit their mutual Barycenter which moves relative to the Sun