Welcome! I think it's really key not to skip meals. If you're really frustrated/feeling gross, how about having an arsenal of veggies to munch on? At least that will keep your body more balanced. I personally recommend a calorie based program like Weight Watchers or just plain old calorie counting. If you have an iPhone, there's a great app called LoseIt, which is free and really is great. For working out, I suggest starting out with 30-40 minutes of cardio, 5-6 days a week and 3x a week of weight training. I'd say the weights are even more important than the cardio. You could also rent some workout dvd's from the library to mix things up. A lot of people like 30 day shred by Jillian Michaels. I like it personally.
Try to take small steps. Make sure you're drinking your water (8 glasses/day). Eliminate all sodas if possible. Try to eliminate all white flour foods, opting for whole grains. I would suggest not having anymore junk food. However, if you're calorie counting, you can fit in treats occasionally so that you don't feel deprived. There are also usually healthy alternatives to junk. There are lots of options out there and you can ask for ideas around here. You can also post a typical day of what you eat and people can help you tweak it so that it's healthier and more balanced.
Consistency is key though. You absolutely CAN do this!
First goal: under 180:
Second goal: 175 or below:
Third goal: 168 (no longer overweight):
Fourth goal: 160 or below:
Final goal: 145-155 (not sure if this will ever happen):