Some Walmarts have condensed goatmilk in the baking section.
As for getting ideas and making your own recipes, first of all, I have to say YAY for someone who doesn't want to just use prefabricated recipes and wants to make their OWN work! Second, for ideas, you should start looking around at what you can get inexpensively, either online or at the grocery stores. Then do some research on those oils, and you can pretty much work your way around there. I started out with a recipe based entirely on what I could find at Walmart. I'm anal and didn't start making soap until I had the perfect recipe on paper, then tweaked it a little bit to make it more what I wanted in an actual bar of soap (the calculations aren't going to always give you exactly what you want). However, it would be just as easy to get your feet wet by making a basic soap recipe from online, or single oil soaps (like olive oil).
If you are looking for recipes, I have a couple I can give you. I bought a lot of my oils on ebay. I got a lot of 50 1oz bottles so everytime I made goat milk soap I had a different scent. There are many variations you can use in your soap. I use glycerine and vitamin E oil in the winter to help with dry skin. In the summer I make a soap using cornmeal and use it as a scrubby bar soap. If you need any help or would like a couple of recipes, I can give them to you, just message me.