Music lessons for kids are typically 30 minutes long or up to 1 hour for advanced students. Kids typically have music lessons once a week, or 4 to 5 times monthly. How many lessons a kid needs depends on their natural talent, experience, how much they practice, and their goals.
Learning to play a simple song or read music can take months of regular lessons. Within a year, lots of kids can play simple songs and start reading music. After about 3 to 6 years, children can play many different songs well.
A kid who already knows some music and practices a lot can learn faster.