Hi David,
- About comments, Hugo has built-in support for Disqus comments (
https://gohugo.io/content-management/comments/), but you can use any other Javascript-driven commenting engine (there are a few pointers to alternatives in that page)
Speaking of Netlify, I can highly recommend them for hosting Hugo-generated websites. It's easy to use and free for basic use cases, and provides many other features which could be useful such as authentication and integration with AWS Lambda. I have no relationship with them, other than being a happy user, I host 5 websites with them and have had no issues.
Hope this helps,
--Diego