How Can I Set Up Google Family Link To Monitor My Kid’S Phone?

I want to start using Google Family Link to keep an eye on my child’s screen time and app usage, but I am not sure where to begin. Could someone walk me through the step-by-step setup process for both my phone and theirs? Also, do I need to create a specific Google account for them before I install the app, and are there any common setup problems I should look out for?