I'm trying my first proper webdev project and i'm learning the django framework.
I came here to ask about the cleanest way to use "static files", like the external CSS i'm referring to in one of my html templates. I tried reading through the official documentation on the subject but found it a little bit confusing as a beginner, i then tried googling but i noticed that most of the guides or stackoverflow answers differed slightly and i realised i needed a better understanding. Bit cheeky to ask but, could someone explain and summarise the process to me?
For reference, here is my project folder hierarchy. At the moment i'm trying to get the template base.html to use the sylesheet at CSS/base.css:

Also one of the things that keeps throwing me off is the use of absolute filepaths. So far i've managed to get away with just using relative filepaths, which makes more sense to me as the aim is to develop on the django test server then transfer it all onto my own server when i have one. (note: perhaps it's because i have no idea how complicated that transfer process is that i don't understand why absolute filepaths are prefered). What's the issue with using relative filepaths?
I realise that this has sort of become two questions, which is against the rules, but i really think both could be answered together and if i understood one it would probably aid my understanding of the other. Any help would be much appreciated.