My story can be found on the blog linked above. My blog includes both my personal story and visa-related events along with information on this whole CR-1 process. Please check it out, it might help you :)For my complete timeline as well as important links, just look above under 'About Me'!
No, you do it after your case has left NVC. For the fiance visa, you have to send forms to the consulate/embassy, but in your case, it'd be completed online.