چ is one of the letters that makes Urdu sound like Urdu and not like Arabic. The /tʃ/ sound is everywhere in your child's day: chai, chacha, chand. Linking the letter to these warm everyday words gives them an immediate reason to learn it. Stroke timing is approximate; the order is curl first, then the cluster of three dots.

When your child writes چ for the first time, write it next to the cup of chai on the table. Show them the letter belongs to the thing, not to the page. That is when learning sticks.