Hypothyroidism....???

I have hypo too, when I'm not medicated correctly I don't lose regardless of CICO when I am medicated correctly I drop according to the effort I put in. I've lost about 20 pounds this year; slow and steady wins the race and I'm ok with that. People on here can disagree with that being hypo doesn't matter, but every human is different. As you might be too, so take it with a grain of salt.

My motivation: my son. I want to run and play and see him grow.

I will say this, go into it as a long term plan not a diet. Change for your health and be mindful - I eat 1700 to 1800 cals a day, excercise is usually walking 10,000 steps or jogging 4 miles and I don't eat back calories (usually). Small changes made the payoff for me - I watch how many calories I drink, watch my sugar (pre diabetic), lots of fruit/veg alongside my smaller portion of lasagna (LOL)...

If you feel that following a certain diet will help you kick start, go for it but at the end of the day just track and be honest ( some find a scale helpful). What do you have to lose...

I'm hypo, well-medicated, and have lost 54 pounds since mid-April of this year. (I'm also *much* older than you, and menopausal, two other factors that some cite as bugaboos for weight loss.)

In my experience, the MFP process - CICO - works. Log meticulously and consistently, set attainable goals (not unsustainably or unhealthfully aggressive), eat at the calorie deficit recommended, and just stick with it. The "stickies" (permanent posts at the top of forum categories) are *extremely* helpful, especially those in the "Getting Started" and "General Weight Loss" categories.

Like Bhlinebee, I recommend thinking for the long term, rather than faddish quick-fix diets as an eating plan. If you track what you eat, and make adjustments where you feel you can make cuts while still feeling satiated rather than deprived, you'll be learning along the way about how to change your eating permanently to stay healthy. If you do more exotic eating plans, i.e., things you wouldn't want to do forever, you lose the benefit of that learning.

As someone with hypothyroidism, its possible that you'll find yourself not quite losing on a calorie level MFP recommends. If that turns out to be true, make sure you're logging very accurately (i.e., weigh your food when possible - it's not hard or time consuming once you learn the efficient methods (they're in the "stickies")). If you're accurate but haven't lost after 2-3 weeks, then cut 50 or 100 more calories a day for a couple of weeks, and see if your body responds. You'll probably find the right level for you within a short period. If you have to go way, way lower than MFP suggests, then see your doctor.

If you commit to this, you can do it and lose weight.

What keeps me motivated is that I finally got *fed up* with health problems that would've been way less likely if I weren't fat. (If you want specifics, click on my ID & read my profile.) Now I'm nearly at goal weight, my cholesterol and blood pressure are solidly in the healthy ranges, my bad knee barely hurts anymore, so I think it has been worth it. Maintaining the weight will be my new challenge, but I'm feeling up to it.

You're young enough that if you get a handle on weight & health now, you can probably avoid some of the bad health consequences that my stupidity got me into over the years. I wish you well with it!