In order to add your own font to the page you should do the following.
First of all, use FTP or file manager to upload your font on your website, in folder...mywebsite/css. Create folder - "fonts". You may also upload your font to Google Drive - check on how to do that here.
Then, open your page and click on the Additional CSS button
3. Then paste the following code in the opened window and click on Save.
There are 3 lines you need to change in this code to upload your font:
'YourFontName' - write the name of your font;
'http://domain.com/fonts/font.ttf' - give the URL of your font here
That's it! Now you font is added to the page!
Feel free to reach us in case of any questions:)