Keys On Low F

I just ordered a Kelpie Low F looks like a good solo key, but when I do get to play with another.

So are F, G and Bb the keys it will play comfortably in??
what about a minor key??

Just trying to get it straight to try it out with a guitar player , when it comes in

thanks
Steve

Well, without half-holing:
F major, F mixolydian
G minor, G dorian
Bb major
C dorian, C mixolydian
D minor

A capo might be handy for most of these keys…

Agree with megapop’s answer–but I say the easiest way is to have your guitarist capo at the third fret, and you both pretend you’re playing a D whistle.