Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
If you are you saying that there are two users (you and your husband), you will need a Microsoft 365 Family (or 365 Premium) subscription so that it can be shared between you. The person who pays for the subscription can then invite the other spouse to share. See https://support.microsoft.com/en-us/accounts-billing/subscriptions/share-your-microsoft-365-subscription and https://support.microsoft.com/en-us/accounts-billing/subscriptions/someone-invited-you-to-share-their-microsoft-365-subscription .