It definitely helps, but at her age if she doesn't enjoy it, it isn't worth it. I did ballet from when I was 3-6 and it did help. When I was 6 I got invited to New Zealand's Steps program which integrates ballet, so I decided to drop it as I wasn't enjoying it anyway. It shows in my beam even...
My goal is to make it to nationals and do my flick.
I live in NZso it is a lot easier to get in.
You can make it from Step 5 (Level 5/6) upwards.
This year I am step 6
I have extremely thin hair but I would honestly just use a lot of hair ties and if your gym has a club scrunchie -amazing. If not look it up on youtube
Is It Thick or Thin
I recommend a bun unless you have a roll in your routine in which case I would Do 2 french or Dutch braids into a ponytail or alone.