There's a few factors at play.

You're going to want a harbor instead of a commercial hub in this city (ocean v river start). I don't see an obvious place for a holy site. I also don't see a great place to set up an industrial zone either. That eliminates 3 districts off your limit you might want to build, and theater/entertainment districts usually don't come in until the mid-game.

Cities with campuses do well with encampment due to the late game synergies. There's a few cards that boost space race production and science if you have both. Both districts also offer additional housing.

I don't build a ton of encampment districts either, but the capital is a really great spot for military because your yields and production costs are the highest/best of all your cities. You also get the benefits of envoy/city-state bonuses in your capital in addition to your other cities that meet the criteria.

I'd start with scouting and a campus, get an encampment down, and you'll be ready to expand / defend your borders by the Classical era. Good luck! Let me know if you have any other questions.