At the beginning of the pandemic, my family would go to Stowe Lake in Golden Gate Park pretty frequently to get out of the house and look at the geese. I picked up some feathers and made a quill pen based on this YouTube video: https://www.youtube.com/watch?v=-EIgYQZZIes

I also made my own ink from beets, which looked pretty cool but faded quickly. Here's a photo: https://imgur.com/a/5zpj92t

One of the fun things about quill pens, if you're 40+ anyway, is you get to practice your cursive.