Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
First, please go to the following page and let me know which Microsoft 365 license is assigned to your account: https://portal.office.com/account/?ref=Harmony#subscriptions
To use the Microsoft Office desktop applications, such as Word, Excel, and PowerPoint, your account must have a license that includes the desktop apps, such as Office 365 A3 or A5.
If your account only shows Office 365 A1, please note that this plan provides access to the web-based Office applications and does not include the desktop versions.
You can read more at A1 products and features - Microsoft 365 Education | Microsoft Learn
If your account currently has an A3 or A5 license but you are still unable to open or access the Office desktop applications, please let me know so we can troubleshoot the issue further.