Businesses buy from wholesalers/stock carriers.
I now own an incense/oils co. out of my home- mainly via internet.
All you have to do is gather info- find 1-3 quality companies you can buy from (given that having a few co. to go through, you may have a wider variety of products sell). Fill out a form for a business liscense (very, very cheap, like $15). And also be sure to read up and know your legalities and laws. Make sure you are on top of it, so you don't get sued.
Best of wishes- it's easy to do, but it's tedious and can take a while to pick up.
Oh, and designate a specific group you want to target when you're advertising.
You can do it!
Good thing- you have $3,000 more than me when I started out. The biz is only 5 mo. young, but gradually getting popularity.