Fira Sans regular
The font I will use for the entire website is "Fira Sans". I went with the regular size which I believe is a 400 point font. I searched multiple Chamber of Commerce sites and found they use sans-serif fonts and most, if not all, of the fonts these sites use look like "Fira Sans". This particular sans-serif looks professional and I know people will look at the font and see that this for an actual Chamber of Commerce.
Header
Header 2
Header 3
Navagation, Footer
Paragraph