Clean Education Theme

Hi Guys, Building my first site - looking good but need some help. my site is called steveahernforex.club and I am trying to make the following adjustments; 1, I want to re-align the page menu at the head of the site to be on one line. The page menu is currently displayed on two lines and looks confusing. 2, I want to change the colour of the search button and the footer bar from blue to black - this, i feel, will compliment the site more. Can these alterations be done on the free theme? If not, can they be done if I purchase the paid theme? Thank you. Steve.