How to prepare for my pediatric residency?

How to prepare for my pediatric residency? I have enjoyed my free time so much that now i want to study something as i have no job to do. I would love to read for the residency just to get a brush up. What should i read? Or should i watch any specific videos or follow a page. Please guide. I have enjoyed my free time so much that now i want to study to get into a productive zone. Please don’t mock but guide me with your ideas.