To switch from Microsoft 365 Family to Microsoft 365 Personal, you will need to follow the process for changing your subscription. Generally, you can do this through your Microsoft account settings. Look for the option to manage your subscriptions, where you should be able to select the Microsoft 365 Personal plan and follow the prompts to complete the switch.
Make sure to review the features included in Microsoft 365 Personal to ensure it meets your needs for writing letters and managing personal projects.
If you encounter any issues during the process, Microsoft support can assist you further.