TerraFirma theme edit question

Hi, this is my Blog-in-construction https://moshimoshi.biz/

Id like to change the font to Bradley Hand ITC but have been struggling with the CSS style sheet.

Also, is it possible to add a page tab at the top, but have it link to one of the post categories when it’s clicked?

Sorry for being greey with 2 queries. Hope someone can help me. Many thanks in advance.

mark