You are so NOT crazy for starting a life change in December. In my opinion, if you can make it through December without weight gain, you get a couple of benefits. One, you'll have had a "trial by fire", so to speak - if you can resist the December temptation gauntlet, think how much easier January will be! Two, you'll be starting at a lower weight...I think the average person gains over 5 lbs during the holiday season.
So

to you for making the decision to start now, even if it will be a little tougher at the beginning. I have no doubt that you'll be glad you made the decision once the rough month is over!
Keep posting...can't wait to hear more from you soon!