Default how to install cyanogenmod on a xperia m

Hi. I have got my first Android a month ago and it was a Sony xperia m c1904. I just rooted it and I have no idea on how to install cyanogenmod 11. Can you please make a text tutorial slowly and clearly on how to install it. I have installed cfw on a PSP and jb an iPhone but I believe this is much more complex. Thanks