[killtimeatwork]

$600-$900 a month is, assuming billing 60 hours per month, $10-$15 per hour. This is the very low end of the rates that third-world freelancers charge for development (mostly web) on places like upwork. If I were you, I'd probably try to go this way instead of aiming for a remote full time position - getting into a junior remote position with zero programming background and no CS (or even engineering) degree will be very hard. But, you can learn web programming on your own, build cool websites and use them as proof of competence on upwork. It can take a while to get established, but you said you have time. The end goal is to leave the upwork grind, by either getting the recognition among a network of clients that trust you and send work your way, or being offered a full-time position with one of the clients.

Disclaimer - I've never actually tried to freelance on such sites, so I don't know how brutal the market is right now.