New EU4 player (~60h) what am I missing?

I’m a gamer who never played grand strategy games before. I started EU4 recently and have around 60 hours now.

I restarted about 10 times, mostly playing Ottomans. I finally feel like I built a decent economy and army, fight periodic wars, then spend peace time growing income, managing vassals/allies, and preparing for the next war.

But the game feels huge, and I feel like I’m only seeing maybe 5–10% of it (I also don’t have any DLC).

So I’m wondering: what is the real goal of EU4?
World conquest? Mission trees? Role-playing? Or am I missing major mechanics that make the game deeper?

Curious how more experienced players approach it.