1. Get an account on Dropbox.com! This is easy and you can just link it to your gmail so you don't have to worry about logging in.
2. Download a font you like! Most places where you can get fonts are:
https://dafont.com (ALL free/don't need an account. I suggest you try to see what new font has been added and usually go see the 'Cursive' ones since those are the funky ones everyone uses)
http://creativemarket.com (You're gonna need an account for this but they always have 6 free things you can download every week and it changes! It's great for styles, etc, and they always let you know via email what they have. If you ever wanna see the old fonts they were giving out, I can screen cap my download section and you can choose what you want!)
https://thehungryjpeg.com/ (This one you also need an account but save as above!)
3. Drag the font to the Dropbox page. It'll appear at the bottom after it's been uploaded to your files.
4. Click Share.
5. Click Create Link.
6. Click Copy Link.
You should get this: https://www.dropbox.com/s/mq371by8qfpvs5s/Aliencons%20TFB-1.ttf?dl=0

now this is the code for it:

<style>


@font-face{font-family: fontname; src:url("https://dl.dropboxusercontent.com/s/herewillgothelink");}
</style>

7. So the end result should be.

<style>


@font-face{font-family: fontname; src:url("https://dl.dropboxusercontent.com/s/mq371by8qfpvs5s/Aliencons%20TFB-1.ttf");}
</style>