I may be able to give some advice here: I've had a show Off-Broadway and am expecting to have another next year, but I'm very much from the DIY scene by necessity. I suspect you are too; while I've had a FEW extra connections and opportunities because of my very brief Off-Broadway run in 2016, most of what I say here is going to apply to you too.
First: if your intention is to go from your laptop to a prestigious New York or regional stage, it will never happen. You could be the next Shakespeare or the next Sondheim, it will still not happen. The quality of your work is inconsequential when you aren't either famous, wealthy or already successful. At this early stage in the game, take the help you can get; you'll need it and grow from it. When it comes to developing a new show from scratch, I have three big pieces of advice. Don't be in New York. Don't be too proud. And be punk rock.
Don't be in New York: major and important shows always seem to come up through New York, but a new show by a passionate nobody is not a major or important show (at least, not yet). You could raise tons of money and try to workshop your show there, but the smartest thing you can do is to take your show and work on it elsewhere, with non-Equity performers and lower costs for space and time.
Don't be too proud: some people will tell you that if your show doesn't premiere at a reputable space with lots of press coverage, it's doomed not to go anywhere from there. Sometimes that's true, but sometimes it's not. Waiting for perfect means waiting for nothing, more often than not. Instead, get involved in your local theatre community; try to be a recognized presence and well-known, well-liked person both at your local major city's professional scene and at the smaller regional and community theatres near you. If you're lucky, these spaces are more likely to take a chance on workshopping your show or even producing it. It won't be Broadway, but it's better for a thing to BE, than to be PERFECT.
Be punk rock: if you've got friends and collaborators, self-producing can sometimes be the best workshop you can get. Call in favors, rent a hall, rehearse in living rooms or the rec room at your local public library. Do the show as a staged reading with zero production value other than borrowed props and wardrobe costuming: you're just testing the MATERIAL and how it plays with an audience and on its feet. Like the DIY punk scene, where musicians got used to taking the whole touring rig out of a van, throwing it up onstage, doing their thing, then putting it all back in the van, THAT is how you want your DIY show to go. And if there's something in the material you've written that is too elaborate or demanding to be done on a shoestring without production values? That right there is a stumbling block you've identified. Anything written simple can be done big, but some things are written too big to be done simple. Don't spend more than $500 on this; call it the cost of a pair of semi-fancy shoes or a new PS5, a single slightly expensive luxury that won't break the bank.
This isn't a blueprint for success or a one-size-fits-all, but I'm speaking from someone who made this work: it is better to do the thing, than to endlessly TRY to do the thing.