How do I set my database so that anyone can create entries?

You can create a public database form that anyone can save entries, in Ragic by setting the correct access rights.

Navigate to the database sheet you want to make public.

Click on "Change Design" to go to the Design Mode.

Navigate to Form Settings and Access Rights

Set the default user group "Everyone" to "Survey User".

This method will allow anyone to create records in your database. For others to fill out this form, you can embed it with the web embed option, as a form that when saved, will automatically populate your database.