Hi there, and welcome! ^_^
When I was getting started with Melt and Pour (I keep telling myself I am still getting started whenever I run out of supplies XD) I first tried to figure out a couple things that I would like to learn how to make.
As in... "Oh! A lemon poppy seed soap bar might be neat... and an soap bar that smells like oatmeal, milk and honey too, maybe with real oats in it!"
That gave me an idea to at least some FOs (Fragrance Oils) I'd like to purchase. If you would like to go all natural, I would suggest researching the beneifits of Essential Oils to scent your soap instead. I adore Lemongrass personally
You also need to figure out what kind of molds you'd like. There are some nifty ways to make some home made molds (PVC Pipe, Pringles Can) but you can also buy some nifty soap molds that look upscale.
I bought mine from:
http://www.spinningleaf.com/
If you want your soaps to have the handmade touch, and still look classy - you can buy a soap loaf mold. This way, you can make a few pounds of soap at a time.
Here are two websites to look around
http://www.brambleberry.com/ - I personally adore their soap bases
http://www.wholesalesuppliesplus.com/ - This place has some nifty stuff. I am currently waiting on an order from them.
Anyway! I hope that helped a little bit.