Weight loss beginner looking for support - in Australia

Have you talked to your M.D. about Postpartum depression? I ask because of your reference to this happening after childbirth. Depression is treatable, as is anxiety. Do not continue to cut yourself off from the outside world. Asking for support is a giant step in the right direction. You are not alone. Most overweight people suffer emotionally because of the problems and prejudice people have toward obesity.
I have certainly been on the receiving end of such behavior. I will never forget a child perhaps 3 or 4 years old commenting on how fat I was to her father while I was grocery shopping. The things I wanted to say to that parent were not fit for a child to hear so I ignored it, other than giving the father a look I bet he remembers to this day. At that time I weighed 400+ pounds. I have lost over 200 pounds of that weight. I plan to lose another 25 to 30 pounds. I started with an 1800 calorie count. Eating balanced meals made from the food I enjoyed eating and allowing myself to enjoy a treat once a week. My weight loss was steady. I found that having a salad made of crispy vegetables(celery, tomatoes, onion, cucumber, carrots, bell peppers, etc. with an apple included for a touch of sweetness and my favorite fat-free Italian dressing as the first course at mealtime helped keep me on track. I included a snack mid-morning and afternoon to keep my blood sugar level. The best thing I did was to start recording the food I ate and keeping a calorie count. I found Myfitness Pal after the first 100-pound loss. I have used it since then.
Weight loss is a slow process with ups and downs. You are learning a new way of living. It isn't easy but it is very rewarding. Your health is greatly improved. Time after time you find yourself able to do something that your weight had prevented. Simple things that are taken for granted by others without weight problems. It is so satisfying and makes you feel so good.
Look in the mirror and tell yourself that you are worthy, beautiful, a wonderful person capable of reaching any goal you set. See yourself through the eyes of love. There will always be someone out there to criticize you, just remember that those people are trying to make themselves feel more important and superior and that is their problem, not yours. You can do this, one step at a time, and if you stumble brush yourself off and take the next step. Reach out, always remember you are not alone, and there will always be people to support you and help you with your journey.

I can’t really relate as I’m male never given birth but I can be very motivational if you need a friend over the sea. My wife and I have recently joined a gym together and although we can’t go at the same time as we have 2 kids, we try to motivate ourselves through exercise and diet and have a little competition around it. She’s winning by a mile but I’m still in the race .