Your program is free or nearly free to the people in it. That does not make it easy to fill. It makes it harder, because free reads as low value, and because you are marketing to two audiences at once: participants who need to show up, and funders who need to see that they did.
These guides cover recruiting for funded programs, writing an outreach plan a funder will actually approve, and the rules about what grant money can and cannot pay for.
A free 30-minute review. No pitch.