"For almost all cases, we learn that the stars within the Milky Way are orbiting around it in much the same way that the Sun orbits around our galaxy."

That is fundamentally incorrect.

The center of the Solar System is taken in by an enormous mass (the Sun).

The center of the Milky Way is taken in by a gravitational storm. There is no mass. It's a Black Eye; it's not a Black Hole.

Gravity is associated with matter, and there are about 100 billion stars in the Milky Way, all with their own gravitational pull. In the center, these gravitational outcomes combine into the greatest gravitational depression there is in the galaxy.

As the images show us, there is an enormous storm going on. No photon makes it through the center. Photons are swatted out of the way before they reach the center. We see the photons that come into our direction; we don't see any of the photons going in any other direction.

https://medium.com/@fred-rick/the-scientific-black-eye-b631eb1817f0