Someday, somehow I am going to try some sourdough starter. I just love the stuff. You can save some starter in your freezer or dehydrate it & store that in a zip bag or a food saver bag. That way if you ever want to stop for awhile or your starter dies, you will have some stored away for re-making. Your bread looks fabulous. I could live on bread!
This dear, sweet lady has a wonderful you tube channel & here's one where she shows (step by step~~~day by day) how she makes hers.
https://www.youtube.com/watch?v=nLCSRuop2jo