Various Pagespeed issues

Here’s a couple of issues I’m having real problems with fixing.

Issue 1:

Use the font-display function in CSS so that the text is visible to the user while the web fonts are loaded. Read more. (adress https://mobilmeckaren.se/wp-content/themes/gridmag/assets/fonts/fontawesome-webfont.woff2?v=4.7.0)

Issue 2
I’ve minified with autoptimize but now it’s turned into a 33kb file located at
https://mobilmeckaren.se/wp-content/cache/wpfc-minified/11t872y8/dth0o.js
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What pagespeed insight says:
Recurring page blocker for representation. Insert available JS / CSS code directly on the page and postpone loading of less-important JS code / stylesheets. Read more.
WordPress
There are a number of WordPress plugins that I can help you add to critical assets directly on the page or postpone the loading of less important resources. Remember to optimize them as these plugins can lead until the features I’m afraid or other plugins stop working, so you can make changes to the code.

So what can I do to minimize that file further?

Issue 3:
Send static resources with an effecient cachepolicy…
What!? I have tried alot of things to make this work but it just doesn’t change, this error remains the same no matter what i do!

Issue 4:
I’m trying to change all the fonts of my website to the same one so I don’t have to load alot of fonts. I’m using yellowpencil plugin to change them. To me it looks like I’ve changed all of the pages fonts to the same one but it still appears to use a lot of different fonts when loading. How can I see exactly what part of the site is using the font that I dont want? Like a plugin that would show the fonts name beside it, or show where all instances of the font being used is located.

How do I do all this? Looking forward to your replies. Thanks in advance.

The page I need help with: [log in to see the link]