Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hello Roy B,
Welcome to Microsoft Community.
I am a Microsoft user just like you, I hope you are doing well?
You cannot subscribe to Microsoft Project license with your personal account, you will need a business account to have Microsoft Project.
You can however switch from Microsoft 365 for home (Personal or Family) to a business subscription.
Below are steps to take to switch to Microsoft 365 Business:
Understanding the key differences between home and business plans.
Understanding when you might get a refund for remaining time on your original subscription.
Step 1: Buy a Microsoft 365 for business plan.
Step 2: Create user accounts.
Step 3: (Optional) Users migrate Outlook information to their new Microsoft 365 for business email account.
Step 4: (Optional) Users migrate their OneDrive files to OneDrive for Business
Step 5: Cancel your Microsoft 365 Family subscription.
See source link for guidance: https://support.microsoft.com/office/9322ffb8-a35d-4407-8ebe-ed6ea0859b9f
Please let me know if you need more assistance.
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Warm Regards