Thank you. I feel like I'm doing progress with exercise - doing the cycles of two days running and two days of upper-body training, each cycle increasing the time/the number of times and reps - but sleep is still beyond me. Do you have, by any chance, a well-informed guide on sleeping at hand, or do you have a name I can research? I wanted to edit the first reply to you, but since you've already posted your answer, I'll ask here: why did you say that TV Tropes sucks? Did you mean that it sucks in? If not, why do you hold it in such a low opinion?
I have no such guide, unfortunately, but I can tell you that getting a vitamin d3 supplement pretty much fixed my sleep schedule. When I stopped taking it, I went back to sleeping during the day and staying awake at night. There are several things that can disrupt your sleep or make it harder to fall asleep. Caffeine is one, obviously, and bright screens (both television and computer) are another often overlooked source of problems. About TV Tropes: I just don't like their approach to media. I feel like they're creating a jargon to talk about stories and characters without actually talking about them.