Plugins

Visual Composer

Visual Composer is a page builder plugin for WordPress which allows you to create stunning website content with simple drag and drop. With Visual Composer you can create and manage your WordPress content in minutes.

Visual Composer comes pre-packed with 40+ content elements allowing you to create pages and posts within minutes by simply dragging and dropping elements into your WordPress website. From simple text block and buttons to advanced accordions and post grids: 

MailChimp for WP

This plugin helps to add subscribers to your MailChimp lists using various methods. You can create good looking opt-in forms or integrate with any other form on your site, like your comment form or WooCommerce checkout.

More information on how to properly use this plugin can be found  here.
Navigate to MailChimp for WP> Forms> Get shortcode option. With this shortcode you can display the form on any page you want.
[mc4wp_form id="3801"] 

WooCommerce

WooCommerce is a free eCommerce plugin that allows you to sell products. You simply need to install this plugin and following wizard create a set of pages to display categories, products etc. Then you need to add a set of products.

Here is a list of really useful links helping you create and polish your shop