I have started reading this, and find I have to allow myself to slow down and take in the scenes.
I normally tear through books, but with Dickens I can't. I have to read slowly and accept that there'll be side-tracks and cameos, and odd characters who are there for the sake of it, and as part of the background.
If I don't read it in this way, I miss the humour and I lose the plot. So I'm making myself take it at a much gentler pace.