What advice would you give someone starting this project?
It can be a little tough to work with, because of the bag material itself, just be easy and work with it !
What you will need
thread & machine
Q&A with Horsegal
I wrote a pattern for people who need help in how to turn a feed sack into a tote bag like you did. It's on Craftsy: http://www.craftsy.com/pattern/sewing/accessory/feed-sack-tote-sewing-pattern-pdf/19452