As much as I think it will be a tough job, I don't think very many people will take on this task if they are not making any profit at all.
That right! For the illiterate people, I don't think we should rush to teach them bitcoin but encourage them to go to school is the most necessary thing. For those who do not believe in cryptocurrencies, it is best not to waste time with them, better to spend that time with people who have a need for bitcoin. We all have a need to increase income, and earn a lot of money, so as long as bitcoin grows, people who invest in bitcoin will give a decent income, and people who do not believe in bitcoin will soon come to us to say that we teach them bitcoin. It's not necessary to rush and waste time. People will eventually need bitcoin.
Not easy how to change people mind when teaching bitcoin to our neighbors, exactly when teaching about bitcoin all them imagine with how much earning every month when learning about bitcoin. I think before teaching about bitcoin need to change people minds with bitcoin is not give us profit without have capital for investing. Need to selective when teaching some people about bitcoin, some people have fund and capital for investing in bitcoin better teach them then make public teaching about bitcoin but many of them not have enough capital later for investing in bitcoin, maybe if OP have another way by teaching how to earn profit with bitcoin without have to invest.