Hello!! to write a diary entry I think you should start with the good old “Dear, diary” and maybe then say “I am a holocaust survivor.” Then write about your “your experiences” as a holocaust survivor. For example, where you stayed to hide, how you would get your food, were you staying with anyone else, how was your day to day life, things like that! I also think you should look at Anne Frank’s diary for a diary entry and how she dealt with the holocaust (of course, she didn’t survive unfortunately, but still a good source!).