We launched… and realized distribution is the real challenge

Hi Indie Hackers!
We recently launched YA, a personal growth & productivity app focused on emotional awareness.
What surprised us most wasn’t product development — it was distribution.
Building the app felt structured and controllable.
Getting attention feels much more uncertain.
Reading discussions here about impressions → conversions → retention really resonated.
For those who’ve already gone through this stage:
What was your first meaningful distribution channel, and how did you find it?