How do I redo my styles? Half the text on my pages don't appear with the correct text attribute

I designed my pages in Artisteer and brought them into Wordpress. Much of my text is not appearing with the proper font and attributes. I would like to re-assign styles in Wordpress, but I don't know where to do that. I don't know how to code the stylesheet. Isn't there a more visual way to deal with styles. Shouldn't something appear under Appearance>Customize where I can assign attributes for Headings and Paragraph styles - and what about for Forms? I'm feeling very frustrated by the lack of visual expression I'm able to accomplish with WordPress. Is there anything out there that will allow me to actually work on my pages while seeing what the page actually looks like while I'm working on it? The Visual Editor I'm finding to be completely useless. Thanks - Sherry