Advice for marketing to a niche population

I want to start serving funeral workers and hospice workers. I think the industry is fascinating, and I imagine the type of grief and vicarious trauma is very unique. I've done relevant trainings for complex trauma and grief, so that's not the question. The question is, what's the best way to network and market to reach those professionals? Bringing care packages to locations? Sending flyers? Cold emails and interviews? I am open and eager for thoughts and ideas.