I think the main reason a lot of child stars don't make it is that it's hard to see someone as cute and then all of a sudden see them as having more depth. ↗
Colour does not make so much difference. Look at the Bach Chaconne: There is not one dynamic mark in the whole Bach Chaconne. Colours do not make so much difference. ↗
So, first you have to be able to play with a metronome. Then you take your freedom. If you play in an orchestra, you got to watch the conductor, he is like a metronome, but it is more difficult because he can change rhythms. ↗