I had to replace my switch right after I purchased the bike, because the dealer mechanic misthreaded the steel screw in the soft aluminum of the switch housing, and they had to give me a new one, that I insisted on replacing myself.
As
@DEcosse says, it's plug-n-play pretty much.
Put yourself in a good mood the night before, get plenty of rest, start early, surprise yourself with how easy it was, and go ride with a grin on your face.