Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello
If you go to your account https://account.live.com > Subscriptions, is Basic the only plan you have?
Basic plan actually doesn't include the desktop version of office apps. So it is normal that your Word and other apps won't work. Basic plan is for 100GB OneDrive storage only. See product page: https://www.microsoft.com/en-us/microsoft-365/p/microsoft-365-basic/cfq7ttc0ktxs