When you say "How do I set up en email account", do you mean how do you process the form so it sends to an email? If that is the case, you need to use a tool such as WebAssist's Universal Email to collect the form's data and send it. There are other tools out there that you could use from other providers or you could even hand code the process part.
Not sure what you mean by, "So far it doesn't do what it claims, is there some missing instructions I need after the form is made?" It is called Form Builder and it builds forms and allows you to stylize the forms while adding validations, captcha, and other security measures; all faster than what you could do if you tried to the build a new form from scratch (and even allows you to save presets for faster creation going forward). So far, my experience with the product is that does exactly what is stated on the WebAssist site at css-form-builder/