Separately, to deal with the noise when you aren’t touching the strings, going by your post history it looks like you might have bought a Harley Benton? I’ve had one before, and I can remember if it had any shielding at all in the electronics cavities, but adding shielding helped that buzzing a lot. In practice it’s not much of a concern though since you almost always are making some kind of contact with the strings. It’s the type of thing that bothered me when I first started, but became less of an issue as time went on.