Thanks for the welcome. Giving advices is dangerous, especially for children, as they have a huge potential that it easy to destroy with bad advices.
I personally try to remember some little things:
1- Music is a "hearing art" like photography is a visual art. If you cannot hear, you cannot play. It is not a "finger's art" it is a hearing's art. Train the ear, and the technique will follow. I play games with Luca, ask him to recognize minor and major chords, (easy to learn for yourself even if you are not a musician), ask him to recognize different notes, ask him to sing me a note, and then check with the piano. It can be fun, and it is probably the most important thing... Especially at an age when the kid cannot have a good technique anyway... my son cannot take his socks by himself

2- Music is more than everything an art. Art is the ability to make others feel what you are feeling. It is about emotions.
Most of the teachers kill the emotions in your child, by focusing too much on technique. I ask my kid to express joy, or happiness, or sadness, or peace with his music.
3- music is a language, made of words (the notes) and they form sentences, and phrases. I ask my kid to follow the phrases, not focus on individual note, but to play the whole phrase in a musical and pleasant way. He cannot do both, so he miss a note here and there, but he has the right vibe