Start simple and stay in control: don’t hire a developer yet and don’t rush into a co-founder—first validate the idea by talking to real users, define the problem clearly, and build a scrappy MVP yourself using no-code tools; once you see real interest or traction, then consider bringing in a developer or a technical partner, and in parallel find a mentor who can guide your thinking and help you avoid early mistakes.

Treat it as a mutual evaluation, not a pitch—clearly explain what you do, why it matters, and your edge, stay concise and strategic, ask sharp questions about their thinking (especially given their related investment), and aim to leave them wanting a second conversation rather than trying to impress or close.