Hi Esther,
I am wondering what module you are on.
If by journal you mean Moodle Journal (as opposed to any other sort of journal created in another application or one on Mahara) then this youtube video might help.
But please let us know what module this is and we will talk to the tutor about adding some guidance to the Moodle page.
Best wishes,
Bob Ridge-Stearn
Head of e-Learning