There are many options because these are personal choices. Pick a SSG that has a template language you like and has decent documentation and maybe plugins. In addition, make sure the SSG is easy to install - for example, I migrated from Jekyll to Zola because the templating language is similar and Zola is a single binary while Jekyll is a Ruby gem with C dependencies (at least it was when I tried to install it last) and I had a rough time trying to install it. For what it's worth, I like Zola, but it might not be right for you :)