As easy as it may sound, Woo Commerce is actually a complicated thing to set up, especially when you're working with the Wordpress platform.
The strongest advice I can give you right now is to try to read the documentation that explains the things in a very detailed mode, from installation to advanced customization, tweaking and more.
Therefore, access their documentation page to read everything there is about the Woo Commerce, then you can apply it to your website and store.
