I haven't posted any updates in a while and I haven't done anything in a while but I will definitely finish this over the next months, my hands are currently full with lots of new "life stuff". As soon as that has smoothed out a bit I'll try to find someone who can give me some input on improving the sensitivity of my energy monitor, as I started studying electrical engineering a few weeks ago I hope one of my professors might be able to give me a little support.

The reading sensitivity is really the only part that keeps from continuing, so if someone can help with some practical advice or some example schematics for an op amp circuit in this use case would be really helpful.