Idea Architecture Help

I posted this idea https://www.indiehackers.com/post/static-site-builder-69a55600e6 last year but gave up on it after getting stuck on the technical details. The main one being domains and SSL. I think this is a key feature that will allow me to standout since the average person is not technical enough to buy and associate DNS records. However, I cannot find a good service that will allow me to use an API or programmatically buy domain names. Or am I going about this wrong?

Here is my current plan for an MVP:

1. Get user info from my site (name, resume, domain name) ✔️
2. Send that user info to my API and deploy their site using https://www.netlify.com API ✔️
3. Configure DNS using Netlify API https://open-api.netlify.com/#operation/configureDNSForSite and https://dnsimple.com/ ❓