CSS and Forms in Dreamweaver

I work at a school and have very little training in web applications, but I have to create some forms and make them work. I know about CGI, but my supervising tech person keeps telling me I just need to learn how to use CSS and I won’t need CGI. I’ve been searching help, tutorials and everything else I can find, but can’t find just exactly how that would work. I can create a form and make it look nice, I just don’t know how to go about collecting results. Help!