How to load and manage a data

I'm starting to create games in C++ using SFML. I'm not a highly experienced specialist, therefore, I have a problem with organization code. So I have a question: how I should I load data into my project (fonts, music, bitmaps)?

Of course I don't do that in each class. I'm writing an separately class for this and sending a pointer or reference to every view class. How I should do this better and easier?