Seeking resource to help with brand template edits

Hi All-
New to ghost. I am looking to change the font color of the “home,” “about,” facebook icon and twitter icon in the top navigation bar. Can someone share the code injection needed? Also, what is the best way to find a resource who can help with basic blog design/template edits? Would rather tap an expert than figure out myself in the near-term.

blogsite is: marymellino.com

Thanks!
Mary