How i can change CSS/HTML

Hi, i wanna create my own Federation, but original design rly scared me :D

Unfortunately, I'm just a designer and don't understand Linux and installation. That's why I wanted to ask for your advice.

How can I set my own styles via Cloud Server on Linux? Can I somehow connect via ftp to the server to update html/css files? Maybe there is some kind of guide?

Or does the Lemmy structure not allow you to do this after uploading the site to the Cloud Server, because it is already rendered?

@nutomic@lemmy.ml