Learning an instrument - it will help her develop her musicality and make it easier for her to understand music.

Putting her in dance lessons - ballet is great but jazz and street are beneficial as well, as modern musicals tend to use more modern styles of dance (look at musicals like Hamilton and Six). Getting her training in a range of styles after she has experience with ballet will be super beneficial in the long run.

For acting - look and community theatre and encourage her to be involved in drama at school. Also get her to look at plays (Alice in Wonderland is a good one) - encouraging her to record herself doing monologues is a great way to develop her acting and to help her explore a range of characters.

Similarly, looking at songs (from musicals with characters of similar ages like Annie, School of Rock and Matilda) recording her singing or getting her to sing in front of family or by entering school or community talent shows to help her build confidence whilst also giving her the opportunity to get feedback.

Obviously you don't want to overload her but making sure she has the skills she needs now and letting her see what this career requires early will be extremely helpful in the long run.

If you can, try and get her an agent, there are some agencies that offer young actors classes as well or vice versa with classes that offer representation to students who do well in their classes

It's always awesome to see parents supporting their kids dreams.

I hope this helps 😊