My D sang in 2 choirs each year all through HS. She is a college VP major now and is required to be in the college choir. So I think you are fine to participate in chorus as long as you use good vocal technique. She also did MT in HS. Her voice teacher helped make sure she sang those parts with good technique as well (no belting), now she does opera roles in college. She is glad she did MT in HS, as it helped with learning stage presence and acting techniques that she can use now in opera. Some of her friends have not had as much stage experience as she has and simple things like “go stage right” mean nothing to them.