Welcome to 3FC =)
First of all. You can do this. Everyone has it within them to change. It's not always easy, and we don't have to be perfect, but we CAN do it for the long-haul.
As to how... well there are a million different methods. Some of them are going to work extremely well for your life, and others are going to be absolutely NOT good for your life. But, the beauty of being healthier and losing weight is that there is no ONE right way, and WE get to decide what works.
I'll use myself as an example. I decided to look up Weight Watchers, because I enjoy the extra accountability. The phone app that I can take with me everywhere to keep a vigilant eye on my food. I love the weekly articles, the extra community support. The Challenges. Etc.
I ~probably~ could do something similar with Calorie Counting, but Weight Watchers is working very nicely for me right now and quite frankly I don't see a need to "fix what ain't broke".
I have learned, though, that... low-carb diets are not for me. Sure, I should stick to healthier carbs (fruits/veg/whole grains), but low carb just makes me feel miserable, cranky and deprived. Deprivation then leads to me binging and overeating.
That being said, there are a ton of folks on 3FC who've used low-carb to curb their appetite and eat healthier. It works for them. And that's good! It doesn't work for me. And that's good, too, because I've found what -does- work.
There are plenty of methods that can be combined or tweaked to fit how you want to live. And as long as they're healthy and satisfying for you, then that's all that matters.
Keep coming back. Keep at it. You can do this!
Can't wait to see you all around the boards!