@chuckwilliams37 @sarah_edo @Netlify DNS is tricky for sure. But our lovely support team are a big help if you run aground (support@netlify.com).
I enjoy not needing to deal with the caching details myself (the defaults should be good for most things) but if you need it, you have control:
https://www.netlify.com/docs/headers-and-basic-auth/#multi-key-header-rules
My tweets and posts live here on my own domain these days.
You can explore them here and follow me on Mastodon instead of Twitter where I'm not currently active.