Hello. I have managed to install both GoAccess and Isso, and I am happy with both.
GoAccess was painless thanks to these excellent tutorials by @GainfulShrimp
Isso has been testing my skills!! Not recommended if the last time you managed a server was 15 years ago (like me). I tried with ubuntu package (outdated), with Docker (buggy), with pip install (buggy), and what ended up working was installing with pip using the latest github master. This tutorial has been very helpful, but installing using pip3 install git+git://github.com/posativ/isso@master --no-binary :all:. This post shows how to embed in Ghost in post.hbs. And here’s my config in case of interest.
Overall very happy to have minimalist tools, that are not intrusive for users, and just useful for a small personal blog.