Do I still eat 0.8-1.5 grams of protein per pound if I’m fat and trying to lose weigh

So as the post says I’m fat 250lbs approximately and 46” waistline I’m trying lose weight and fast but also gain some muscle in the process but that would mean meeting 200 g -312g of protein and quite frankly that would require a coloric intake of 2500 cal + which would impede weight loss wouldn’t it ? So what now or what do I do

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