Simple Sourdough Bread
Even "Simple" sourdough starter guides tend to be ridiculously complicated. You don't need special flour, you don't need a complicated feeding schedule.
All you need to do is:
While you bake the rustic loaf you just started, take that 1/8th cup of dough and
Your starter should now be sour and smell like youghurt.
Now you can use it to do the whole thing again using it instead of 1 tsp of yeast and using slightly less water to achieve the same consistency.