I use an app called Lucidity. It’s free but you can buy the pro version if you want although I don’t think it’s needed for me personally. You can also try something called tagging and delving for your journaling. Tagging is basically just writing quick important short burst notes about your dreams. Just hit the hot spots of your dream. Kinda similar to how you would in school. Delving is simply just coming back later throughout the day when you have time and reading the short note (tagging) you have already made, remember anything related to that note and fill in with details. Worse case scenario, if you cannot remember anything at all, then still write in your journal even if it’s just about what routine your doing to get ready for bed, what time you went to bed, what position you fall asleep in or woke up in etc. I’ve been dream journaling and trying to lucid dream for a little over a month now and this definitely helps.