If you want to start keeping a safe and secure journal, a task that Apple says “has been shown to improve wellbeing,” you should watch the video from Apple Support which takes up only a little more than four minutes of your day to teach you how to do something that you might end up doing every day for years. The video shows you how to set up the app including recommendations and notifications.
The video also shows how you can start a new entry from the Journal app or other compatible apps including News, Photos, and Podcasts by tapping the “Share” button. Or, you can start a Journal entry from a recommendation. The example shown in the video uses a photo memory to create an entry. In addition to using end-to-end encryption, you will be able to secure your entries by locking them with a passcode, Face ID, and Touch ID.