It's not bad for a first shot. It's a bit too uniform though it probably needs to be more broken up. Also the stars around and throughout the galaxy should either be mostly confined to the circular disk of the galaxy or otherwise must represent a star field between the observer and the galaxy. If the stars are actually part of the observer's galaxy (such as for all galaxy photos we see here on Earth) then you should use more than just blue stars. Red, Orange, Yellow, and White would also be individually distinguishable. (and there are far more visible Yellow and White stars than Blue.) If the stars are part of the galaxy being viewed then they should be more like crystal hard pinpoints rather than blurry masses and they should be for the most part contained within the disk of the galaxy.