Sounds like you're good and ready to take another shot at this!!
Just know that losing weight and any amount of it IS a doable thing for any one and every one - yourself included, regardless of your circumstances, regardless of your past history.
People ask me all the time how I lost so much weight, they can't even lose 10 lbs and I tell them - that I decided to. Yup, I realized that I didn't have to be fat if I didn't want to and I made the decision to lose the weight and live up to my full potential. It was upon making that decision, and the ensuing commitment (cause' lord knows motivation doesn't last very long and never seems to be around when the ice cream, cake and pizza is) that I stopped making excuses and started finding solutions. I then devised a plan and stuck to that sucker like glue. Like glue, tweaking it as needed of course.
I'm glad you're back and rearing to go. I look forward to hearing of your progress!!