Earn more from my products (e-books / apps), wouldn't say goal but hopefully a stretch goal that the products profit can cover my living expense (~$700 a month,

Earn more from my products (e-books / apps), wouldn't say goal but hopefully a stretch goal that the products profit can cover my living expense (~$700 a month, I live in a relatively third world country). My current monthly average earning from products are around $150 ish