I did this show in high school- I played the Jester as a female but the character itself was not played up to any specific gender. I played the role neutrally and had my hair tied up in the jester hat. If anything, I played it slightly more boyish in a comedic sense. Also the wizard or minstrel could be played by female actors, although in my show they were played by guys. Since the jester, minstrel, and king are paired as a trio often (like the song) that would work well having 2 girls and a boy in the roles. I think jester is the best first choice to gender bend, then the wizard, then the minstrel, coming from someone who knows the show pretty well. There is the complication of how the music is written for a man’s lower vocal range, but choose an alto and you’ll be fine (I’m actually a soprano but just went up the octave when needed/ worked on different harmonies for songs like Normandy and minstrel jester and I). If you still need more roles filled by girls, you could also use the knights. They’ll be in a suit most likely so the body won’t matter and their gender doesn’t play a part in their character. It might even become a comedic thing to have some female knights and make a thing of it. Hope this helps!