It depends on the source. If you downloaded it from a reputable font foundry (like MyFonts, FontSpring) or the official designer’s GitHub/Portfolio, it is safe. If you downloaded it from a "free fonts dump" site that makes you click through pop-up ads, run a virus scan on the file before opening.
Check out "Font Waknan Pairing: Best Sans-Serifs to Combine" or "Kerning Tips for Waknan Headlines." Install Font Waknan
Double-click the font file. This automatically opens the Font Book application, showing a preview of the typeface. It depends on the source
Simply open the character panel and type "Waknan." FontSpring) or the official designer’s GitHub/Portfolio