How would you find early users for an AI tool aimed at new parents? I will not promote.

I’m a first-time founder building an AI tool in the parenting space. One thing I’m struggling with is customer discovery. The product attempts to identify different types of baby cries from audio, but I’ve realized building the product was easier than finding parents willing to test it. For founders who have built products in highly specific niches, what channels actually worked for finding your first 10-50 users? I’ve tried Reddit, but most parenting communities prohibit self-promotion. Curious where other