hi! so fly itself isn’t what you’d want to use for configuring your domains’ records.
For that, you’d want to pick out a third-party DNS provider like DNSSimple (we use them ourselves for the platform!) or Cloudflare – a lot of users configure their records with them, and have posted their about their configs.
Whichever DNS provider you end up using will likely have instructions/screenshots in their own documentation for setting this up.
We have a few articles in our blogs/docs that might help get you started: