Congrats on your first ttrpg! Journaling style games seem really popular in the ttrpg space right now in particular, but I haven't tried any yet.
Viewing post in Bookstore by Chance - Solo Journaling Game
https://kestreleliot.itch.io/village-witch
My first one was this one. I enjoyed it quite a bit. You can even remix it and play it two-player by sending letters to a friend witch!