Best Practices for Developing MVPs

Hey!

I've been recently (2-3 months ago) affiliated with a startup at the idea stage and I'm the only developer. I developed the MVP, which is pretty much done, but the other founders are asking constantly for revising certain parts. I think we should have released the MVP within a month and iterated but I cannot seem to convince them to put this version in front of some users.

So my question is, What are some best practices for developing MVPs? How should a technical person communicate with non-technical founders pre, during and post developing the MVP? How is this different from iterating on an MVP?

I feel like I need a different process for going from 0 to 1, then iterating on an already built product with some users. What is that process?