Menu's Help…..

I am really new to this. As it is my first blog. Honestly I have been working on this all day and it is really starting to stress me out. When I chose this theme I went by how the sample looked. There are multiple menu options under the main heading picture. Now that I have chosen the theme, it is telling me that I can only have one menu option. What can I do to have multiple ones like in the sample picture? It keeps telling me I can put them on the side, if I do add more, but I want them at the top. Please help.