Big weight loss goal

My name is Kristin and I have decided to lose weight and get healthy for my family. Although I am obese..at 330 lbs.. I actually do not have any health problems besides being large. But at age 26 I know it won't be long before my body starts shutting down. I am hoping to lose 160 lbs. I weighed 180 lbs 6 years ago and thought I was fat but now realize that was a good healthy weight for me at 5'9". I know it's going to be a long hard journey but I am willing to put forth 100% to get this weight off. I have been at it a week and though I haven't weighed myself I can feel a difference just from cutting soda and eating non processed foods. I hope I can keep this up and make it to my goal.