My heart goes out to you and all that you've been through. This post-mortem (PM) was interesting to read through. Usually the PMs I've read through have three main sections called 'what went right' and 'what went wrong' and 'lessons learned'.
I think the biggest takeaway here is simple: Nobody should get into game development to make money. Game dev should be a hobby (at best) until such time as it becomes profitable/sustainable to do otherwise. Make prototypes and crowdfund the entirety of game development so everything doesn't have to be a solo project. Or if it is a solo project then with crowdfunding you can afford to eat.
I'm deeply admirable of your efforts to do everything from scratch. While I've never heard of that game engine, the LUA programming language information is somewhat useful. It is used for WoW addons and many other bits as a supplementary (rather than primary) programming language.
Focus on studies, get that piece of paper, get some work to pay off your student loans, then take some time to make more games as a hobby once your IRL is more stable.