[ofalkaed]

Just dive in. Finnegans Wake is not meant to be understood in totality, you get what you can and let what you do get suggest meaning of the parts you do not get. Reread it every couple of years, you will get a bit more each time and also lose a bit of what you thought you had gotten previously; every read will be surprisingly different, you get glimpses of what you saw previous times but they are never as you remembered them.