"Prior to launching vim.so I was heads down for about 4 months working on an online interactive Python course called Deliberate. [...] I was working on Delibera

"Prior to launching vim.so I was heads down for about 4 months working on an online interactive Python course called Deliberate. [...] I was working on Deliberate in the early mornings before my day job for 4 months and I had made $0." [https://www.slip.so/blog/how-I-made-10k-teaching-vim https://www.slip.so/blog/how-I-made-10k-teaching-vim]