My child is six-year-old and does a little bit of DIY. Is it fine if I upload it on youtube and show him how people are watching his stuff and appreciating it? Is it fine if I introduce him to this in a commercialised sense?

Hi mommy, first off, do wish your child all the best from my side :) I love watching DIYs a lot and there's nothing like little ones trying it out and making smart use of things. YouTube is a great way to show your talent to the world and also monetize your art if you want to. I don't think there is any harm in showing your child how people appreciate it, as I think it will only help to build self-confidence. As long as it does not affect the study routine and gives your child enough time to play and enjoy life as a child, I would feel it is fine to monetize it too. Maybe you could handle the monetizing and planning part while your child does the real DIY tutorials?