It’s not only the quantity of text that can be jarring in a notice, but also the variety of fonts deployed.
We encourage our clients to set a consistent approach to fonts across all media (website, letters, notice boards). Having a specific font for Titles/Subtitles, and another for regular text can help distinguish sections.
A Serif Font can be a good choice for Titles / Subtitles, giving a more classic / vintage feel. For normal blocks of text, a Sans Serif Front is typically easier to read.
Picking fonts from Google Fonts is a logical choice, as they can be used in Google Docs / Slides (free for all), or downloaded for use in Microsoft Office.