hi new to the forum

I weigh 150 pounds 5.75 ft
my BMR 1,672 & my TDEE is 2082, 500 calorie deficit means I need to eat at 1,582 to lose just one pound a week

I will also be following Austinite's Fat Loss Protocol using Over the Counter Products

But what I don't understand is how i am meant to lose weight if eating under bmr because a lot of people have said it will ruin your metabolism or wont be healthy etc, is eating under bmr OK?