What a beautiful loaf! Prior to my going Keto I always kept a sourdough starter, as my downfall is bread of any kind but specifically sourdough. Once established, I kept him in the fridge and fed him every 7-10 days and just a small amount. I highly recommend this site for all things bread, especially sourdough, everyone is so helpful and there is a wealth of information. Have fun!
https://www.thefreshloaf.com/