WOW, you have been through alot. But, that's all in the past and Good on you for starting to get healthy again.
I've had a low thyroid since i was 18 and am now 56. I've done alot of research, not depending on the medical dr's for their, here take a pill and watch what you eat' attitude. Yes, i'm still on medication but much lower than i've been in the past and always getting blood tests to make sure the dosage is right for me at that time.
You don't have a specific diet on your page. What i do see in your food input is not good. Without knowing your eating plan, it's hard to give advice. Are you going to go with a specific plan to lose the weight or just go for healthy?
I'll tell you what i did over 20 years ago. I eliminated everything 'white' , white sugar, white flour and white starches. All gone, forever, no nutritional value in any of them. If you need simple carbs to fill out a meal, then change white rice to wild rice. Whole grain products, and if you need a sweetener use Stevia.
your input of a bagel, cream cheese and Doritos is a sure fire way to keep putting on the weight, and getting very little nutrition.
Low thyroid levels can hinder weight loss but not stop it if you really put an effort into it. It may slow it down and that's even more reason to work harder and eat cleaner.
just out of curiousity, what's your blood type? that might help determine which diet plan is best for you.
email me if you want and we can chat more.
If it is a plant, eat it, if it comes from a plant, don't!