@spacelordmother thanks man I highly appreciate your effort. I am just really not comfortable with this stuff.
But I got a freaking Weller soldering iron, which cost more than the Axo boards I want to solder on haha So I got the right tools, I think.
But about my soldering skilles. Only think I really soldered was the Axo control board, which as you can read in my first description only lastet for a while, before it started failing, which resultet in humming on the output of Axoloti.
About the "low output issue":
The first badge of Axolotis had some issues that could cause the output to go almost mute.
There is an example of it here and how to fix it:
I dont have a breadboard. Ill see if I can find one. It does seem like a less destructive way of learning this
And thanks I appreciate that you want to help