Hi,CJ Atkinson
Welcome to Microsoft Community.
I understand that you are having problems logging into your account in Android OneNote.
I'm sorry to hear that you are experiencing issues in OneNote. An email can only be tied to one Microsoft account, so you cannot link two Microsoft accounts to the same email.
However, you can take a notebook from one account and transfer it to another account.
You can do this by opening the OneNote desktop app on your computer, signing in with your personal account and exporting all your notebooks. Then switch to your Work/School account and import those notebooks. The steps are as follows:
Open the OneNote desktop application and select the notebooks you want to export.
Click File > Export > Select Notebooks > Select the export format (e.g. OneNote Package File).
Switch to your work/school account and click File > Import > select the exported file to import.
Synchronize using OneDrive:
Ensure that both your personal and work/school accounts are connected to OneDrive. move notebooks from your personal account to OneDrive in your work account, and then open those notebooks in your work/school account.
If you want to permanently close your personal account, check out the link below:
Close your Outlook.com account - Microsoft Support
Please contact me if you need further assistance.
Best Regards,
Mila.L-MSFT| Microsoft Community Support Specialist