Qr code components using html and css

First question is about this GitHub stuff, I don't know how to use it, I'll really appreciate if I can get a tutorial on how to use it. My second is in the project... Was I meant to build the qr code or just that card with the qr code in it and the texts. 3. Ok, so this is not a question buh I just want you guys to suggest what I should have done to make the project look better. I'm a beginner pls