To use Woocommerce download the plugin from https://woocommerce.com/ and install it. After the activation follow the instructions and at the end you will have 4 pages: Shop, My account, Checout, Cart. It all ready and you need only to insert the products from Products menu.
To set the sidebars go to Apparence > Theme options > Woocommerce. You can insert the sidebar contents from Apparence > Widgets area.
You can also set custom titles for the archive pages and search pages, to set the sidebars go to Apparence > Theme options > Page Titles.
You can also activate the Woocommerce menu from Theme options panel.