The trick here is to find a very specific niche to start with. Instead of the goal being “let me get this popular everywhere” your short term goal should be to find how to make it popular among a single existing community. Churches, mosques and synagogues are a good place to start. People in those groups already like to support each other and virtually all of them have one or more internal WhatsApp or Facebook groups where people who start a campaign can advertise to others in their community.