Achievable in 6 months?

TDEE is meant to include all your exercise burns as well. If you're in the gym 5 days a week you're not "lightly" active. Your TDEE is probably closer to 2970-3300. You probably don't want to be eating less than 2500/day IMO.

a) read what ILiftHeavyAcrylics said re: setting your goals, tracking, logging, measuring food, setting macros.
b) DON'T spend 2 hours a day in the gym - there's absolutely no need and you'll likely burn out. Pick a good lifting program like one of the ones she mentioned, and implement that.

Okay I will eat 2500 cals, cus I will never be able to eat that much, but hoe much should I burn a day to lose "1.5lbs" a week? Just as she said.
I will do weight as recommended. How much?
And okay I won't spend 2 hours, but enough to lose 1.5 pounds a week, yes.
Pls tell (I feel bad for asking so much)

You're combining the methods. You can't do that, it doesn't work.

If you're going to do TDEE method then you're just going to be losing a percentage.

Decide if you want to use MFP method (a set number of pounds per week) or if you want to use TDEE method (a percentage)

. Deleted to avoid complicating things. Yes, first clarify what method you plan to use.

Correct. If you burn 700 calories in the gym, then you get to eat 700 more on top of the 1660. The deficit you need to lose weight is BUILT IN to that number of 1660. If you did no exercise and ate that much, you'd still lose weight. So if you burn extra, you eat extra. The exercise is not so much about losing weight, it's more about keeping your body healthy and retaining muscle mass so your body looks the way you want it to after you've lost the weight. Tracking your food and meeting your food goal is much more important in the long run.

TDEE is meant to include all your exercise burns as well. If you're in the gym 5 days a week you're not "lightly" active. Your TDEE is probably closer to 2970-3300. You probably don't want to be eating less than 2500/day IMO.

a) read what ILiftHeavyAcrylics said re: setting your goals, tracking, logging, measuring food, setting macros.
b) DON'T spend 2 hours a day in the gym - there's absolutely no need and you'll likely burn out. Pick a good lifting program like one of the ones she mentioned, and implement that.

Okay I will eat 2500 cals, cus I will never be able to eat that much, but hoe much should I burn a day to lose "1.5lbs" a week? Just as she said.
I will do weight as recommended. How much?
And okay I won't spend 2 hours, but enough to lose 1.5 pounds a week, yes.
Pls tell (I feel bad for asking so much)

You're combining the methods. You can't do that, it doesn't work.

If you're going to do TDEE method then you're just going to be losing a percentage.

Decide if you want to use MFP method (a set number of pounds per week) or if you want to use TDEE method (a percentage)

Okay so I chose the second option, says my net consumed is 1660 cals, the more I burn the more I eat?, so does that mean, if I don't do exercise then I would just lose weight? If I do exercise I would have to eat however much I want to burn? Till it reaches 1660 cals?, if this is rich seems simple enough, but how much should I be burning (if I'm right). According to someone 1000 deficit not enough, does that mean I need to eat a lot more? How much more? (Answer these if I'm wrong)

(Pls tell me if I'm wrong)

Okay. Go to your goals. Set it to lose 1.5 lbs per week. Then you eat that much, plus however much you burn off at the gym. So if you burn 500 calories and your goal is 1800, you'd eat 2300 total. Make sense?

That's it.

Now, on top of that, make sure you're eating enough protein. You're 180 lbs so aim for 144 grams of protein. For fats aim for 63 grams.

And do some kind of resistance training. Either lift weights or do body weight work.

I inscribed here only in end of September, I am on my routine since middle august and lost 7 kg in 4 months. So I think you can lose 10 kg in 6 months in a healthy way, and I have gained muscles too so also consider if you replace your fat weight with muscle mass plus lose some kgs you will look even better if you just lose the kgs.

I agree with everybody 2 hours wont help. I remember I was in a gym long time ago, I went like everyday, did 1 hour boxing, 1 hour weight lifting and running and I still was not losing weight or training well and focused. I changed to circuit training which was more focused in like 45 min and I lost like very fast and in 5 months.

I married, moved to new place and gained like 10 kg that I am trying to eliminate and changing my lifestyle in my possibilities to reflect that. I am doing variable exercises sometimes 3,4, 5 per week as my time let me. I bought a heart rate monitor to keep me informed if I am not slacking and could do more during the work out and I do 30 to 1h workouts. But my weight lost is not so fast as many people, but I like the way my body is transforming itself.

For me cutting pasta, cereals and bread a lot, helped me. I prefer rice or potatoes. But this is just me. You have to listen to your body too, each person has its preferences and if you dont listen to it, after you lose your desired weight, you might gain again if you and your body dont like your diet in the long run.

You can lose that much weight. But you said you wanted to be lean, which means you want to keep your muscle. To keep your muscle you have to make sure that you're not maintaining too large of a deficit, because your body can only burn off a limited amount of fat at a time. If you've got a lot of fat you can lose more per week, but as the fat reserves get smaller so does the amount you can lose. If you try to do more you end up sacrificing muscle.

As to your macros. Follow the number of calories MFP gives you, but their macros are designed for a sedentary person. Since you're exercising and eating at a deficit you need more protein. That's also going to preserve your muscle. You can do into goals and change your macros manually.