a TODO list for when I get there
If you're looking to rank up with the engineers while you're here, we'd find it really useful if you used one of the following blueprints as the "get the rep" module - it won't cost you any extra materials, but it'll help improve their research for everyone. Ones which might be completed by the time you get here, depending on how long you take, in brackets.
Etienne Dorn: Manifest Scanner (or Kill Warrant Scanner)
Petra Olmanova: Mines, Torpedoes, ECM (or AFMU or Chaff)
Marsha Hicks: Fuel Limpets or Hatchbreakers (or Cannons)
There's quite a few interesting stations in the region - the trophy dash will take you to a few of them already, but Foster Terminal in Coeus, the twilight mountains of Concordia Hub [1] in Edge Fraternity Landing, and Mortimer's Charm in Kinesi are also worth a visit (not a complete list...).
There's a Glowing Green Giant inside the nebula. Plenty of molluscs to have a look at, too, all over the region.
In terms of mysteries, there's Hyford's Wreck in the Colonia system, and the mysterious wreckage orbiting Kinesi 3b - possibly both have more to discover.
While you're visiting memorials, there's a beacon outside Jaques Station commemorating one commander, and of course the Dove Enigma megaship nearby for another.
Some distance down from Colonia is "Colonia Point" - a pair of Wolf-Rayet stars at Thaae Pruae AA-A h5 giving a spectacular view of the galactic plane.
[1] Depending on time of day and year, the twilight mountains might be positioned quite some distance from the actual station. You'll know them when you see them.