One of the better websites I found is
www.pantrymama.com
Very basic recipes for a beginner.

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Easy sourdough bread baking on any schedule! From sourdough basics to the most delicious flavored sourdough loaves.

Very basic recipes for a beginner.
Buttermilk? Hmm That's sound to be a lower yeast and higher lactic acid formula.I came across this video recipe today. Never thought about adding buttermilk to the mix but I can see how this would help getting it going.
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How to Make Sourdough Starter From Scratch | Our Gabled Home
The EASIEST way to make a sourdough starter from scratch: no measurements, no discards, no feedings! And perfect for beginners!ourgabledhome.com