How to change menu hover and font

This is my website: horriblehomemaker.com 1. I was able to change the font color and the menu bar color. But how can I get rid of the hover background color? Can I change the hover to something else like underline or bold? 2. How can I change the menu font? 3. Is there way to get rid of that grey background and make the entire center have a white background? Thank you. I'm new to this.