Looking to purchase a house with no credit?

So I'm looking to purchase a house (my first one) relatively soon as the amount I spent on rent is nearly 1/3 the price of mortgage. Other variables such as heating/utilities (which im paying at my rent) have been calculated. So here's the thing;

I have no credit / loans / debt in my name, and nearly everywhere requires credit. Are there Government Programs, Charitys, Organizations that help people get the large down payment they need?

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