Build an Online t-shirt Store

I'm looking to build an online t-shirt store. This should include a control panel to where I can add new designs for t-shirts and have options such as colors for t-shirts, price etc. The look and feel should be easily navigated. I'd also like users to be able to sign in and share through social media. This must also include free shipping for orders over a specified amount and a section to place a coupon code. Quantity and sizes should be specified also. Users should be able to save past payment types and see past orders. The payment system will be through Stripe.