200 lbs to ONEderland / Lose 55lbs by year 2016

I am determined to lose 54lbs by new year 2016, and finally be in onederland. I am tired of being over 200lbs. Its been more than most of the past 10 that I have not been in onederland. I started doing hiit workouts and walking. Im trying to stay under 1800 calories a day. I want to get to a size 8 in jeans. Im starting at 253lbs and a size 20 in jeans. Im working out most days of the week.