As a courtesy to those of its occupants who prefer rooms, it does have a modality in which it presents itself that way: a room, with as many chairs as it needs, and a bulletin board, and a vending machine with candy and chips and concepts sold for nothing to anyone with the right prerequisites.
On the bulletin board, if one chooses to perceive it as a bulletin board (and not as a wiki or a flower or an ineffable cloud of information or an eternally malleable clay tablet) people whose only common trait is that they get to come here leave each other notes.
Notes about physics, about magic, about grand sweeps of narrative. Notes from people desperate to fix a never-ending heap of problems, smug about the condition of their homes, curious about the wider omniverse. Signed with names and sigils and "you ought to know who I am". Terse or verbose or nested with as much meaning as interests the reader.
In the vending machine, if one chooses to perceive it as a vending machine (and not a basket or a fruiting tree or a file repository or a crystalline fractal) are many things... and they have notes connecting them to their reviews on the bulletin board.
This one, for instance. She (it's usually, but not invariably, a she) has fairly glowing reviews from most of her previous purchasers. Here is what you need to install her; here are some things that are recommended for best results but optional especially if you just want to use her as a beacon for her other instances; here are some things she comes with as add-ons you can take or leave; here is what she is good for. The reviewers who don't like her are annoyed that theirs was too good at it, if you read between the lines. Well, that and the fact that if your universe is unpleasant enough sometimes these critters figure out how to flip you off and leave before they figure out how to solve all your problems. (There is a tangent thread about alternative solutions to similar problems which come bundled with stronger irrational attachment to their homes, but they have more stringent installation requirements.)
They come in these colors and styles; you will need to compensate for the following standard-issue drawbacks in some way if you require services of them that intersect with those areas of disability; they are only rated for upbringings of the following severity and are less likely to hate you if you stay thoroughly under that limit and less likely to fail at important goals if they are given opportunity to self-educate; if you have a way to generate them as instant adults they can begin work immediately but on the standard trajectory age six is the absolute earliest and teens is customary...
There is a chart (if one chooses to perceive it as a chart) of template interactions that have been tried before, but a lot of the more interesting accessory and companion templates are out-of-network for some visitors. What a pity.
"Probably whatever you do will do significantly more good than harm, considering what people have said about your template in that between-worlds place. But that doesn't mean it's not better to be careful."
"If we find a way to do that, but right now we don't have any way to access other universes."
"Apparently there's another between-the-worlds kinda place that more people can get to, called Milliways, and you can get to other universes from there or just meet people therefrom."
"There is, apparently, no way of knowing until it happens. But I certainly wouldn't bet against it."
"Yes, even if we somehow knew for sure that you would, there would be no guarantee at all of when."
"Yeah. And besides, I want all the other mes to be proud of me when they meet me."
"You also haven't found Milliways yet. And the suggestions you've made aren't as much as you're going to do, but they're not nothing."
"Mm, I suppose I'm naively modeling the situation as occurring some significant time into the future."
"I will try to do things between now and the future. I have a lot of things to learn though."
Magic! Magic proceeds magically. Once Mehitabel has her first spell condensed for easy casting, Anaphiel shows her another one with many of the same elements as the first. "But you should cast it as a ritual at least once, even though you have condensations of several of the steps."
"Basically it's so the components that haven't been condensed can sort of--link up to the ones that have. It encourages them to condense more easily. You could do it just with condensations in the spots you've got for them, but it would take more time in the long run."
Just a few times. The components of the spell that hadn't already been condensed slot together much more easily into their assigned abridgements than the ones in the first spell did.
And then of course she has to condense the sequences before she has a single working spell. Anaphiel points out a few places where it would be more efficient in the long run to condense this group by itself before adding it to that other one because the sequence in question shows up enough to make it worth it.