A good nutritional education is essential to get and keep great shape for a long time. Learning nutritional education doesn't mean to change all eating habits at once - no, you should absorb each information timely. And each new good habit learned will be another step toward a new life.
When under intensive stress, it's better give a time to solve it before starting dieting. Intensive stress can steal your attention and motivation, so if you start a diet now likely you'll fail. You need identify what is causing that stress, solve it and plan your new eating habits.
It's better a light workout every day than a heavy but less frequent workout routine. For instance, you can distribute 210 minutes running along the week or running that time only on weekends. Total time is identical, but in first situation you are creating a good environment to acquire healthy habits.
Do you know what happens when you go to grocery hungry? You can't believe, but you brain will interpret that hunger and propel you to buy foods rich in calories. I know, it may seem crazy, but your brain is trying to make you survive. And there is a simple trick to fool your brain: eat before going to groceries!
You shouldn't consider weight loss goals like something isolated, it should make part of your whole life! Replacing junk food for healthy food and practicing some sports or exercises will help you. Give yourself a new life and your body will please you.