really sorry if it is an obvious question, but: I dont know, how could I add new (Font Awesome) social icons to my blog. Here is the repo: https://github.com/gerineldo/gerineldo.github.io .
The theme I'm using is: https://github.com/LeNPaul/Lagrange
README says that I should use _config.yml but I don't know, how and what to add. Can I manage it on GitHub or should I download the repo files to my computer? I'd like to give an icon to my freecodecamp-profile.
Thank you for your help. I started to learn about web page development just some days ago, I'm a beginner.