How to make a writing pen
Here’s a few links on the subject. Note some methods are more complicated than others.
1) A hard one: http://www.woodturningvideosplus.com/writing-pens.html
2) An easy one: http://www.education.com/activity/article/Make_Quill_Pens/
3) A medieval one: http://medievalwriting.50megs.com/tools/quill.htm
Then here is one YouTube video on the subject: https://www.youtube.com/watch?v=IHDKqpvBM4I
Last is a story on writing and quill pens: https://www.nhhistory.org/edu/support/nhgrowingup/quillpens.pdf
And here is one more link from YouTube on making a feather quill pen: https://www.youtube.com/watch?v=-EIgYQZZIes
As to how to make ink, well that is another subject. Our ancestors figured it out and so can you.
In the meantime, here is one link: http://www.instructables.com/id/How-to-Make-a-Quill-Pen-Ink/