Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Dear Kibriyanur,
I hope you are doing well!
Regarding this situation kindly check with your organization Admin the subscription you are using. Generally, this means that you are not eligible to install Microsoft 365 Apps. You may check this You currently have not been assigned an office license that includes the Office desktop apps - Microsoft 365 Apps | Microsoft Learn
If your subscription is Office 365 A1 subscription has web version of Word, PowerPoint, Excel, OneNote, and Outlook. This plan does not include desktop version of Office apps, and this is the reason you are unable to download Office apps from your Office 365 portal.
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You can check the following link to compare education plan. Free Microsoft Office 365 for the Classroom | Microsoft Education
Your understanding and time will be highly appreciated.
Best regards,
Inema