Welcome vbrenn, Start your adventure at ECF with clicking the Info Zone at the top of this page, then the New E-cig users section. Loads of info on terms, and questions that have been answered thousands of times because new users do not want to read this section.
Your link to flavors is to Fastech, which is in China. There are loads of vendors for e-juice in the USA which will deliver faster and are highly recommended, so my recommendation to all people who are new to vaping is to read, read, and read some more before they spend, spend, spend their hard earned money.
You really do need to understand the different types of devices that hold the batteries as well as the devices that deliver the vapor and flavor. There are different types of threading between various brands and vendors which are not compatible unless you use an adapter, so become informed before you buy.
Best Wishes
Wabbit