I have found several maps of the Traveller Universe which I will upload here. Your character has a general idea of these and has probably seen them at some point in their life.
This is a large map of the various empire and faction outlines: Universe Map
This, however, may be even more useful, it is an interactive map in the Traveller Universe that allows you to zoom in to different sections and even see common jump routes: Interactive Map
The Campaign will mostly take place in subsector 268 (The one shown when you first open the interactive map), and players will be mostly familiar with the inhabited planets in that sector and nearby. Check the Traveller Wiki for more information: District 268 Subsector.