Just wanted to make a small post advising folk that you may want to reconsider enabling the Watchtower creation whilst playing through the Terran Armada DLC.
This may seem obvious to some but it wasn't to me who was going into both fairly blind.
I'm trying not to spoil too much but they both have similar gameplay loops and mechanics and once both are in full swing they can be pretty intrusive on your play through. It can get a little overwhelming / immersion breaking.
I can see both being far more enjoyable if experienced separately. Looking back, my advice would be to play through Terran Armada to completion and enable Watchtower once it's over, or even save it for a NG+ run, or vice versa.
Also having now experienced both I would strongly recommend Watchtower over Terran Armada if you are looking to pick one (just my opinion). It's an incredible mod and fits into the Starfield universe seamlessly. Bravo to Kinggath and his team.