Here’s a map of the galaxy. It’s quite large and detailed. Click to make it larger. In most browsers you can then click again to make it full size (probably bigger than your browser window, so you’ll need to scroll around).
Many “extended universe” (non-movie) sources are used in making any such map, and we are not using the EU as canon for this setting. We’ll use this map for convenience. However, any star systems appearing on the map but not referenced in the movies may be completely different in the game than in EU.