How to pre-create default model objects

I have a model Training which contains many objects of model Lesson.
There is foreign key relationship between Lesson and Training - Training object can have many Lesson objects.

I want to pre-create 2 default Training objects: Recycle Bin (to hold “deleted” Lesson objects) and Drafts (to hold Lesson objects which are not yet associated with specific Training).

What is the best practice way to pre-create default model objects in database ?

Check out data migrations or management commands