Have you ever read an entire dictionary?If you have,help me out I'm trying to do the same?

Ok,I have started reading an Oxford dictionary.I have completed reading all of the entries for 'A' now.O boy!did it take me a long time to do that.This is how I actually read the dictionary.I try to read almost all the words in a page even those I formerly knew,to find a better way of using the words,I jot down the words I have never seen before and their meanings,Occasionally I jot down an example too for words that are complicated to use,I also write down unfamiliar idioms I come across and their meanings and also jot the occasional example.My questions-Am I being too -retentive?How long did it take you to finish?and Can you advise me on how to continue this feat atleast in a faster more feasible way?