we trialed DD1 at 3.5 yrs old at a dance class, small group only abt 8 of them but she hated it and got scared.
like ur DD loves dancing at home and to the telly, but wouldnt have a bar of an actual lesson, but thats cool, we might try again at maybe 5.
see if u can take her to one lesson as a trial to see if she likes it or not, we didnt have to pay for ours, so hopefully it will be the same for you guys