I love my Juki 1541 triple-feed walking foot machine for sewing bags. When I first received my machine at home, it took me a few weeks to get the hang of it. I remember the first few days I was afraid to re-thread it or change my bobbin or needle. I took notes when my dealer (Sunny Sewing machines) walked me thru the steps. I took some pictures. I also went online to watch videos. I then compiled this Cheat Sheet for myself which I kept by my machine for the first two weeks until it became routine.
I've shared this with a few folks who found it helpful as new owners, so I am making it more widely available here. I hope you find it helpful too.