Many websites we build now for our clients use WooCommerce inside WordPress. It's popular e-commerce software and work well. It works so well that WordPress actually bought WooCommerce, so the two are very connected now.
Below are some resources to help you learn how to manage your online, e-commerce store. If you're a Website Care subscriber, you get the basic WordPress video tutorials included. It's in your WordPress Dashboard (admin) on the right side under "Manual."
Complete WooCommerce Tutorial:
How to Process Orders:
Orders, Reports, Coupons: