The default Secure Boot setting is Full Security. Boot Camp comes with your Macbook for free, and it allows you to install Windows alongside macOS, so you can choose which of them to boot on startup. Learn how to check your Secure Boot setting. Boot Camp Assistant will use it to create a bootable USB drive for Windows installation. Click on the Bootcamp setup then install.
When Boot Camp Assistant finishes, your Mac restarts to the Windows installer.
