Both my kids do swim lessons and they have done so since around 12 months of age.

DD started dance class at around 3.5yrs, once a week. She LOVES her dance class but she's not keen on dancing at the twice yearly concerts as she gets really nervous. So she is saying she doesn't want to do it next year. As she's starting school next year I'm reluctant to enrol her into any other extracurricular activities until she's settled into school. She has been asking to learn keyboard or piano but we might hold off for 6-12 months and then see! She has never complained about going to weekly classes and she understands that I've paid for her to go along.

DS just started a weekly sports program and he looks forward to it every week. The program rotates through 10 different sports so I think its a good way for us and him to figure out what he likes.

Most places are happy for people to do a trial class so that might be an option for you to figure out what she likes before committing to a whole term?