You have been given good advice.
As it has been said it has to become a lifestyle change and not a diet. The first thing to do is throw all the crap out of your refrigerator and pantry and go shopping Baked lays and diet soda are not healthy. In my opinion when you have a lot of weight to lose, the only thing you should drink is water, with some occasional crystal light. Cheat meals need to be outside of the house only if possible initially.
This is what your kitchen should look like:
http://www.johnberardi.com/articles/nutrition/berardi_kitchen_1.htm
http://www.johnberardi.com/articles/nutrition/berardi_kitchen_2.htm
Here is a good general list of foods (go easy on fruit and nuts during weight loss). It is not all inclusive and just a general idea of what to buy:
Proteins
Boneless, Skinless Chicken Breast
Tuna (water packed)
Fish (salmon, seabass, halibut)
Shrimp
Extra Lean Ground Beef or Ground Round (92-96%)
Protein Powder
Egg Whites or Eggs
Ribeye Steaks or Roast
Top Round Steaks or Roast (aka Stew Meat, London Broil, Stir Fry)
Top Sirloin (aka Sirloin Top Butt)
Beef Tenderloin (aka Filet, Filet Mignon)
Top Loin (NY Strip Steak)
Flank Steak (Sir Fry, Fajita)
Eye of Round (Cube Meat, Stew Meat, Bottom Round , 96% LeandGround Round)
Ground turkey, Turkey Breast Slices or cutlets (fresh meat, not deli cuts)
Complex Carbs
Oatmeal (Old Fashioned or Quick Oats)
Sweet Potatoes (Yams)
Beans (pinto, black, kidney)
Oat Bran Cereal
Brown Rice
Farina (Cream of Wheat)
Multigrain Hot Cereal
Pasta
Rice (white, jasmine, basmati, Arborio, wild)
Potatoes (red, baking, new)
Fibrous Carbs
Green Leafy Lettuce (Green Leaf, Red, Leaf, Romaine)
Broccoli
Asparagus
String Beans
Spinach
Bell Peppers
Brussels Sprouts
Cauliflower
Celery
Other Produce & Fruits
Cucumber
Green or Red Pepper
Onions
Garlic
Tomatoes
Zucchini
Fruit (if acceptable on diet):
bananas, apples, grapefruit, peaches, strawberries, blueberries, raspberries
Lemons or Limes
Healthy Fats
Natural Style Peanut Butter
Olive Oil or Safflower Oil
Nuts (peanuts, almonds
Flaxseed Oil
Dairy & Eggs
Low-fat cottage cheese
Eggs
Low or Non-Fat Milk
Beverages
Bottled Water
Crystal Light
Condiments & Misc.
Fat Free Mayonnaise
Reduced Sodium Soy Sauce
Reduced Sodium Teriyaki Sauce
Balsamic Vinegar
Salsa
Chili powder
Mrs. Dash
Steak Sauce
Sugar Free Maple Syrup
Chili Paste
Mustard
Extracts (vanilla, almond, etc
Low Sodium beef or chicken broth
Plain or reduced sodium tomatoes sauce, puree, paste)
You will learn to make a variety of recipes you enjoy that are quick and easy over time.
I lost 80 pounds in under 6 months. Once I decided to change my life the results came faster than I expected. The basics are easy and with dedication your results will come fairly fast. Get educated (everything you need to know is on this site) and stay dedicated and the fat will melt. Most people lack the dedication.
There is excellent advice on this forum for nutrition and training. You need to learn as much as you can.
I did a lot wrong and did not truly make a lifestyle change or look at this site until the end of my weight loss. You have the advantage of doing it now.
The first 2-4 weeks for me were like drug detox for an addict. Try your best to eat especially clean your first month to get your body used to your new lifestyle. Burger King would actually talk to me when I was driving home in the beginning (not really, but you get my point). I was not an overweight child, and did not have emotional eating issues. I just became inactive, my portion size became to large, and I was eating too much crap with most of it late at night.
Now I actually enjoy eating healthy (I never expected this to happen). I do not count down days for a cheat meal. I really do enjoy the taste of most of my meals, but I now mainly eat to survive. I try to add variety to my diet, but I could also care less if I ate the same leftovers several days in a row. I do not ?deprive? myself of anything and I do not feel like I am missing out. I have occasional cheat meals (mainly restaurants with family and social functions), and once in a blue moon I have a day where I eat like complete shit. One day I had 2 pieces of cheesecake, and a whole large Dominoes pizza after I already had dinner. That was the worst I can remember in the last 6 months.
Much of skin changes are affected by age and genetics in regards to weight loss. IMHO you have a good chance of not having loose skin, and only having few stretch marks. If you were older and heavier I would say otherwise.
Not to say it is easy, but losing the fat is much, much easier than gaining muscle. I now truly have respect for the dedication it takes to add a significant amount of muscle to someones frame.
Since you already posted you picture, take monthly photos and post them with your weight to keep yourself motivated.