Build a Multistep Checkout Process for WooCommerce

We want to build a store similar to the one here: [login to view URL] Our site will be a Wordpress WooCommerce shop, where people can order product pictures from our photographer service. The example link is only a price calculator without a checkout page. We want a five-step process that should be similar to the "Produktshot" site, All options should be displayed all on one page with tabs at the top which they can use to navigate back and forth. The buttons and options will be very similar to the example page, but there might be a few minor variations. The order will be: Step 1: Select Catagory Step 2: Select Amount Step 3: Select Perspective Step 4: Extra Options Step 5: CHECKOUT We will mostly need help with the checkout process, besides that we can set up the website (more or less) by ourselves.