Do not worry about sourdough yet.
Buy some whole wheat flour, and some unbleached white flour.
Mix half and half to make this recipe
http://www.nytimes.com/2006/11/08/dining/081mrex.html
Each time you make it, change the ratio to more whole wheat untill you are at 100%.
This does not ferment as much as sourdough, but it will give you good experience working with whole wheat, and getting used to a more sour taste.
White rice is not the end of the world or a hill to die on. Just make sure its not polished or enriched and you will be miles ahead already.
You can make a goal of one year to make a full switch to brown rice, for the sake of the family.
Or however long you want it to be.
Then you have learn about soaking it
IU is short for international unit.
Evaporated Cane Juice is the only sugar that is actually whole.
Still has some heat applied to it, but its quite low.
Can be found by these two names.
Sucanat and Rapadura.