I like the photos in your gallery; your subjects seem very comfortable with you and I think that makes a huge difference. I especially like the ones of the girls group singing, nice captures there.
I wish I had some hints and tips to share but, like you, have kind of stayed away from the genre. I do find borrowing a kid helps. My niece and nephew will pose for me sparingly and one of my best friends just had a baby so I get to practice there.
Just keep getting out there and trying. IMO what you’ve presented in your gallery is a great start.