As a prospective player, I urge you to release this as quickly as possible—but as a fellow dev, I'd recommend you further delay your initial release for as long as possible. Once your first release is out, that's it—you're in the release game and the clock is ticking. If your next update isn't ready within three months, your project will be marked abandoned here and interest will begin to flag, patrons will grow impatient.
You've set yourself a high standard for quality of content, you're working with a single artist where assets will bottleneck, and your team has IRL jobs they'll need to prioritize over this project until it sees significant success, so it's very easy to expect major content delays that would stall an update and irritate fans or potential patrons. If you hold off on first release until you've completed your second (or even third) release, you always keep your team safely ahead of what you actually put out as a buffer to mitigate the all-too-real possibility of missing deadlines, promises, or scheduled updates.
My game's nowhere near release yet, so you can take anything I say with a grain of salt—but I'm involved in webfiction serials and my general advice for new writers is to always build up a backlog of several (5 - 10) chapters before they begin posting their fic to a site so that they can ensure regular releases. Never underestimate how unreasonable an impatient fan or patron can become!