I am so excited for you!!!!! You CAN really do this. You really, really CAN. Losing weight and a large amount of it IS a doable thing. With great desire, commitment, determination and hard work (the most gratifying work you'll ever do!) it's possible.
When I myself started out this last time, I too knew that this time it was for real. All the other times, honestly - I just didn't have that feeling. I felt like, "Nah, who are we kidding; I can't do this". But then this last time, I knew for sure, for sure that I WAS going to do it. So, I just - did it. And you will too!!
I am greatly looking forward to hearing about your success as you travel on this incredible journey towards good health. It's just the absolute best!