I personally use Syncthing for backing up gamesaves to my home server and it works great. While it would technically work for this application, it would be significantly more work to set up and maintain for photo management than just kicking up an Immich Docker container. Go check out their docs if you haven’t already, it’s pretty sweet how easy it is to manage stuff with Immich
I’m no pen enthusiast, but I used to really enjoy Zebra. Build quality was good for the price point, and they were super smooth to write with. Unfortunately the quality went downhill maybe 5 or so years ago and they haven’t been great in my opinion ever since. They still feel fine physically, but the ink will stop dispensing randomly while writing. Got sick of it and switched to Pilot. Been using Pilot Precise V5 0.5mm and find them great. The ink runs a little wet though, so the only downside is that if you rub your palm across the page too soon after writing it’ll smear a bit.