Hello, I run a guitar repair shop in the west of Ireland. I also build guitar effects circuit from scratch and construct them in enclosures. I'm interested in learning about electrical safety and eventually repairing AC 230V devices.
Cool, i've thought about making guitar pedals as well

My advice for 230V stuff is to not forget your multimeter probes in the 10A socket, especially if the 230V device is still plugged in

Especially if your 10A fuse is just a piece of copper wire wound around the fuse terminals

230V is no joke so make sure you don't get zapped, i've been zapped a few times and it's no fun.
Anyways, welcome to the forum.
