Hello and welcome @NitOni
You can always lean into how you are feeling now about what you are writing about from the past. Perhaps in the past you were repressing your feelings, so you never totally really felt them anyway, and that's OK.
Journaling won't be the same everyday, and it's important not to have expectations that it will always have to bring up a lot of trauma. Perhaps you write about 6 things (over 6-7 days) that seem trivial...and then you realize that they all shaped how you began to think. This is exactly what happened to me. It wasn't about trauma at all, it was about how I developed critical thoughts about myself.
Here's the TMS wiki guide to journaling. It has lots of different methods like spider writing and unsent letters that are helpful to mix it up a bit!
https://www.tmswiki.org/ppd/How_do_I_journal%3F (How do I journal?)