(Used to do Jekyll, currently using Hugo on Github pages, but I'm thinking of switching to Gatsby since I know more React than Go, so it's harder for me to make changes).
It's hosted serverless + open source too like Isso.
But maybe doesn't matter much what commenting system one uses — because almost no blogs nowadays seem to get any comments, anyway :- / It's all Facebook and Reddit etc instead, right.
I have a blog with just 1 blog post, and it uses Gatsby. I'm thinking about switching to Hugo though because Gatsby feels a bit complicated, whilst Hugo seems to have "everything" built-in (like tags. I want tags). It's funny that you're using Hugo and thinking about switching to Gatsby :-) Like you, I know React well (that's why I went with Gatsby). And nothing about Go. Hmm I'll probably stick with Gatsby for the nearest future then.
Netlify right now. I had a look at your blog b.t.w., via your profile. Why shall each post be exactly 10 sentences :- )
As far as I know, Hugo requires very little knowledge of Go to use — going so far as to implement their own DSL of sorts.
What kind of features are you trying to implement that would require knowledge of Go?
You can read about our set up here https://gohugo.io/showcase/forestry/