>>5973232Maybe don't start a legit business right off the bat then.
Start as small reseller with your own website or even a blog at first, something that can get a lot of exposition, like tumblr. Have a couple of dolls at first, some sets/clothes or whatever you had in mind (from popular companies) that are sure to sell.
You can also try to contact a few doll companies with inquiries about their distributor/resale policies, what their minimum order quantities would be for a maximum discount price. Most companies will want references to even consider agreeing to this kind of agreement, so you should have at least a basic yet well-designed online shop established that you can show off. Depending on their business model, presentation, a concise proposal and politeness will get you far. Sometimes they require a specific turnabout in sales.
But if you want minimum paperwork/communication hassle, set up a one year plan for yourself that involves constantly searching doll company webstores for sales, limited products etc. and then sell them for regular/a slightly marked up price at your store until you've acquired several return customers and made some profit. That'll usually be enough to show if you can follow through with some bigger moves.