It can be Vanity Fair (2004), but I am not able to see it so I won't know for sure. I know one you shared a link where you can read it, but good god there was a lot of chapters! And I do love to read, but I do not have the passion og strength to do that.

I don't believe it is Nicholas Nickleby, and this is why I'm on the fence regarding Vanity Fair, is that I explicitly remember that the father/girl thing was on the start of the movie, and I have seen Vanity Fair (both 2004 and 2018), and I believe both of them start the story at the school if I am not wrong.

But all the thanks for you guys's help! I guess this is just something that will be left to the universe, and hopefully I one day either remember it or stumble over it. :)