I have no idea about which key, I don't understand keys.
It might be something very simple but I just don't get it.
Even if I knew the theory of keys I could not then advise on the question you ask.
Alas, I don't play a musical instrument. I often sing around the house when doing housework as I like to sing but that is just home singing.
Something that I do wonder about, does anybody here know the answer, I saw once that German volksmusik sounds (different/better) than English music because the instruments are tuned to a different key not just for volksmusik I think, something about the tuning of instruments on the European mainland. Does that mean anything to anyone here please?