i'd been talking about this idea on and off for a year. Took the plunge on jan 1!
Taking a marketing-first approach to this so the first thing i did was put up a landing page. Fortunately convertkit just went freemium https://nathanbarry.com/convertkit-free/ so i just went with that. setting up custom fields was a lot finnickier than i expected and i couldnt figure out how to configure custom domains.
i announced it on my personal twitter, as a bit of a commitment mechanism. next step is to build a no code mvp.