First preload can not be used because it is not support by WordPress and more importantly not supported by all major browsers.
In addition, The font file is only 1,280 bytes, so, if the webhost is really taking 1.8 seconds to serve that file, then there bigger issues at play that you should seek the support of your webhost to resolve. This file should transfer in tens of milliseconds. And, after reviewing the waterfall report on GTmetrix it does only take 20-40 milliseconds.
I tried to visit your site, but the cert is bad and if I ignore that, then my firewall blocks it flagging it as a possible malware site. So I’m not going to risk viewing the page.
Also looking at the GTmetrix report for your site, it seems there are over 330 requests many of which take multiple seconds to load. I would recommend reducing the number of requests per page load and better optimizing of the CSS/JS files being loaded. You will get far better results targeting that low hanging fruit vs worrying about a single 1,280 byte file.
I hope this helps!
