First, welcome to the forum. It's a good place to find useful information and encouragement. Your story's similar to that of many people here.
Although you already understand what I'm going to write next, I'll still write it:
Weight-loss takes time. There is no magically short-cut that is safe and sustainable. It is a change for life. It requires a change in the way a person thinks about food and a change of the habits that got that person fat in the first place. Being anxious and wanting an immediate reward is unrealistic and will doom a person to self-fulfilling failure (hmm, I suspect that's part of the reason how I got fat - wanting everything now - including the delightful sensations of eating and satiation - and not caring about the long-term consequences!).
Don't worry so much about what other people think about you in public. It's fleeting. Everyone - fat, thin, short, tall, rich, poor - is so concerned with their own appearance and of what other people think about them that they rarely have much time to notice and to make personal judgments about strangers. If they do actually take notice it's more a case of deciding how much of an inconvenience to them is created by a situation (like sitting next to a fat person on a train may take away some of their arm room, poor dears). It's often nothing personal at all.
The point is that you've finally decided to do something about it. Good on you! A lot of people don't and continue for the rest of their (somewhat shortened) life. Taking control and changing poor habits is a skill that, once mastered, can be applied to other areas of a person's life just as successfully.
Here in the forum you can join the challenges, chart your personal progress, tell your story, make deals and contracts and write down promises of behaviour, get encouragement and, if needed, a (gentle) kick up the rear-end from your fellow forum dwellers, and whatever it takes to stay on the weight-loss wagon and make the change to healthiness and happiness.
See you around.