From what I can gain from this game, I am just confused by each transition, so I feel that creating at least a walkthrough could free up that confusion. However, if you don't want a walkthrough, how about making a wiki? This is, at least, my opinion, and I want to see how people would respond to this.

Theirs a wiki here that shows where everything is with a map the lockpick is on the stool top middle right the one that looks like a pincushion it doesn't glow but trust me its there because I just got it.  a walkthrough section too, here I'll give a link. Areas | CoffeeStory Wiki | Fandom 

I recommend going for the lv 2 card that's where Karia is hiding, the lv 3 card you can go after as well if you have time to get it which is used to access the decontamination chamber and the portal for another nightmare scene. It's honestly too bad that it only features the lab and the manor though, I kinda wish they had finished it out for the void forest wonder land and the research lab aka site zeta but its better than nothing I suppose. So if anyone can finish it out on the wiki and add the looping forest the void forest wonderland and site zeta that'd be nice, I feel like the looping forest needs a walkthrough and that there needs to be an outline for all the recipes what they do and what you need to make them.