Back when I constantly needed a pen I used to use a Parker espirit telescopic fountain pen, since it was the best small fountain pen that cost little enough that I wouldn’t mind loosing, but it was still small enough and good enough for my tastes. More recently since I stopped needing an actual pen with any sort of frequency it just kept getting dry and I just decided to stop carrying one.
This days the only thing that I physically write with any sort of frequency are ttrpg character sheets and for those I just need a good pencil, so I moved to the wsd magnetic 2.0 mm lead holder. I just love it both as a great mechanical pencil and a fidget toy
I recommend setting it up with a let’s encrypt cert via tailscale, that way not only you get a proper cert for free without opening your pihole to the internet, but also you get a way to use it when you are not at home, but if you are using a raspberry pi 1 or any other pi from the SD card I recommend using Log2ram in order to preserve the SD card
Edit: forgot to add that you should install zram-tools and run
on a first gen pi since the low ram can increase the tendency to swap especially with unbound and that can also kill your SD card prematurely