My advice would be to start small and start making products for your friends and family first. You will need to do some experimenting anyway to perfect recipes and scent combinations. This will also give you time to research containers, labeling, and bulk suppliers for essential oils and natural body care additives and bases. You want to make sure you are making a profit so you have to be able to cost your product accordingly. This will take some time and research. You'll want to be sure you're getting your supplies wholesale and at the best price.
To start a business of this sort, you'd need to research business start up requirements, such as filing for a tax number with your state, registering as a business out of your home, insurance etc. You'll also have to be able to have enough stock on demand to meet orders should they come in. You'd probably have to start out doing craft fairs, cold calling to shops or getting a sales rep in the gift industry.
I tell you this from experience. I started a business 5 years ago (not in body care products but something similar) and the business took off so fast I couldn't meet the demand. I was up until 2am some nights making the products and shipping them out. I started it on very little money and didn't have the money to put back into it for expansion. It was a valuable lesson and one I call a "market analysis." I also worked at a local natural body care manufacturer. She grew her business from her basement into a multi million dollar company.
As for a shop, that would take a Business Plan and more than likely a loan to get it set up. Its certainly an option down the road.
One should never give up on dreams just because it seems impossible at the moment! You just never know. So do start dabbling with it, make some items and from those find the products you or your friends like and go from there.
http://www.soapmakingbusiness.com/
http://artsandcrafts.about.com/od/arti4/a/032307.htm