I think about weekly or monthly updates, it is more about the download.
If u go for shorter but more frequent updates weekly/bi-weekly, i think it would be good choice if u go for 'patches'. So the players can download only the new episode, instead of the whole game, as larger as the game will become, the more taxing it is to download X amount of GB just for a short update.
If u go for large updates that is less of a problem, at least until it reaches 5-6GB upwards, than u should think about spliting it in parts, with the possibility to import the last save, so u can keep the download size manageable.
Not all have fast internet or have limited volume, they will certanly be thankfull for it.
For the build up of a community, even monthly is a frequent release shedule, so i wouldn't worry in that area.
Personaly i think u should work as it fits u best, make the episode so that u are statisfied with it, in terms of length, content and quality ect. The most of us know very well u can't force creativity or quality.
Don't be to fixed on a release date and if there are problems which will delay the update, be honest and upfront about it, the fastest way to get the people toxic is when ur lie to them.
Ur active here, which is certainly a good thing if u want to build ur community, most like a dev which keeps in touch with his followers, listen to praise, critic, theories ect.
Just be prepared that u will likely also face the more ugly side:
People which will compare ur game to others and criticize based on that, simply like to troll, some think they can shit on others work simply because it is the internet and anonymous so why not... and depending on the story, also emotional outbursts (posts) which will likely sound harder than they are intended to be...so don't take it too personal and don't let something like this discourage u.
Depending on the direction u want take the game, it would be a good idea to add ''planned tags'' in the op, so people see what awaits them. This is of higher importance if u want to add the more dark/niche kinks and fetishes.
As a example, many will be upset if u have a more or less vanila game and midway suddenly the dev add's rape/ntr/cuckold. For many player/suporters it will feel like a slap in their face, if something like this comes out of nowhere, like this was not what they signed up for.
For niche/dark content, it would be a good idea to make it avoidable, if u have planed something like that.
Also :
Avoidable = it doesn't happen, neither on- nor off- screen
Skippable = we don't see it, but it still happens
I just add this as many devs don't seem to differentiate between the two, but for immersive players it is importend.
Sorry for my long rant, maybe some of it will help u a bit.
