We create a journal / journal table at creation of table?

False.

Journal or Journal table is created at creation time of database
or users. we can also create these using MODIFY statement of
database or user.

At table creation time we just specify
1. Enable or disable journaling for that table
2. which journaling table to be used
3. what type of journaling to be used(Before / After/ Dual Before / Dual After)