How to check if journaling is enabled or not on my disk?
You do not specify which version of macOS you are using. I will assume the current version (macOS 10.13.3).

Open the Disk Utility application and select the volume you wish to check. In the image below, "MyFish" has been selected.


  Note: For a better view of an image, either click on the image or open the image in a new window.


Next, click on "File" in the menu bar. In the pulldown, you will see "Enable Journaling". If "Enable Journaling" is grayed out, then journaling is enabled, otherwise journaling is disabled. Below, the image shows the volume to have journaling enabled.



The older versions of macOS, would allow for journaling to be disabled directly from the Disk Utility application. With macOS 10.13.3, journaling can be disable by using the diskutil command. Below is the command to disable journaling for the "MyFish" volume.

diskutil  disableJournal  MyFish


Similarly, journaling can be enabled by using the command below. As stated earlier, this can also be accomplished from the Disk Utility application.

diskutil  enableJournal  MyFish