Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello.
if your daughter is a minor you cannot use her account to set up as the very first user in a new computer. Have you tried logging in with your Microsoft account? It should be set up with the family organizer account first. Make sure your daughter is in your family group. Once setup go to settings > accounts > family. Scroll down and find her account and change to allow sign in. Restart after that and you will find her account listed to sign in.