Keep OneNote as is and just add Noti on top.
Your original is untouched. 3 steps, done in minutes.
Migration steps
1
Export your pages
In OneNote, export pages or copy the body text.
2
Sections = lists
Reconstruct OneNote notebooks and sections as Noti lists.
3
Import into Noti
When you paste the text, date and time expressions are recognized as event candidates.
Sync. There is no direct sync with OneNote; events and to-dos are managed in Noti.
Frequently asked questions
Can I sign in with a Microsoft account?
For now, sign-up is centered on Google accounts and email. Outlook events come through the Google integration.
Do tables and drawings carry over?
The migration is text-focused, and complex formatting like tables and drawings is simplified.