Learning how to install/ use BepIn Ex is a bit of a trial by fire, but it's worth it once you get it working. My first time modding with it was for Rune Factory 5.
Take your time, follow the tutorials closely, and make backups
If there's one piece of feedback I've been holding onto for a few months now (I play on and off), it'd have to be the photo submission menu. Especially with this new stacking system, I think it's become even harder to navigate the menu to get the "Ready to Submit and Delete?" prompt.
I do like the idea of a photo stacking system, but I wish the submission menu would keep easier track of selections, have an icon guide on the page, and a manual completion button so that players know for sure they are submitting what they want and do not have to reselect photos to get the prompt.