That is literally impossible. There are too many mutually exclusive activities for the time slots you are given. For instance; if you want to court your "land lady" you will lose out on a lot of opportunities to shack up with your classmates. You have to decide who you wanna bang and focus on them.
I have a guide for how to get a fair amount of them, but by no means all of them.
https://f95zone.to/threads/college-daze-v0-420a-g28.41722/post-9559612
I'm not so sure about this. You're right that there are a lot of mutually exclusive activities and if you choose one you'll miss out on others. But when I did my Lightless run a while back I found that the real trick to this game is knowing 2 things: stat requirements and key moments to exploit them.
I want to preface what I'm about to say by acknowledging that this is one of the better games on this site and I think G28 should be lauded for their work. But if you ignore the way the game is intended to be played and just look at the raw stats and event timings you start to see a lot of shortcuts and holes that aren't going to be noticed by most players. For instance courting the "land lady" doesn't require nearly as much work as it would seem. Now, is that "work" fun and well written? Yes, and you'd be remiss to just skip it all. But is it required to get that girlfriend/harem/etc tag attached to the character? Not really, no. At least not all of it.
The best example of this that I ran into was Karen. When I first played this game I was intrigued to see how I could best unravel the mystery there and, of course, get into her pants. This lead me down a path of orange lights and several other interactions. But when I did my lightless run I figured out that all you really need is a high enough stat to trigger the ability to profess your love after you take her out for ice cream. Literally that's it. Ignore the woman the entire game until you have one stat high enough, take her for ice cream, and say you love her. Boom, she's your's to do with as you please.
I suppose if I had the motivation I could do some kind of walkthrough, or at least compile a list of "minimum requirements to bang X", but when you start looking at the game through that lens it loses a lot of it's charm. Any game would really. Sort of like how speedrunners end up bypassing most of a game's story. It's still fun and challenging for most games but for a text based game? Ehhh. Maybe not as much.
IMO the best way to play this game is to essentially do ranked choice voting. Your best girl has content? Click that. She's unavailable because of the dicking you just gave her? Is best girl #2 available? Rinse repeat. Done that run one too many times? If you're still down for more that's when you start doing challenge runs like Lightless or "Always Choose Option 2".
Have fun.