I’m glad you’re going on this journey. It can be a fascinating way to get to know yourself better. Within a few weeks of dream journaling and recalling I started seeing repeating themes that are clearly very integral to who I am. A lot of the themes I’ve noticed revolve around childhood issues and anxieties that have followed me into adult life. I’ve read that nightmares and anxiety dreams could be negative and repressed issues and emotions that need processing and working through. I’m yet to really tackle them myself but I’m more aware now of the things that are troubling me and can look out for these same themes and negative thought processes in my waking life. If you need any tips on journaling and improving dream recall then there’s many good fellows and informative threads on dreamviews.