Start with high-confidence the art of journaling books, then narrow by subgenre or adjacent topics.
Writer to Writer
Gail Carson Levine
Writing Magic
Find Your Voice: a Guided Journal for Writing Your Truth
Angie Thomas
Wonder Seeker
Andrea Scher
Writing Radar
Jack Gantos
A Writer's Notebook
Ralph Fletcher
Draw Your Day
Samantha Dion Baker
The Creative Writing Playbook
Megan Wagner Lloyd, Madeline Garcia
Rip the Page!
Karen Benke
Practice You
Elena Brower
How to Carry What Can't Be Fixed
Megan Devine
Write Your Own Story Book
Louie Stowell
5-minute Writing Prompts for Kids
Chevahn Brown