Relying on an ad to convert a user is a big ask. Another approach could be to offer something high value to your target market in exchange for their email which

Relying on an ad to convert a user is a big ask. Another approach could be to offer something high value to your target market in exchange for their email which you could then use to slowly raise awareness and convert users over a series of emails that offer even more value to them. That way you're greatly increasing the surface area of interactions with potential users while still genuinely helping them.