don't understand tdee,bmr,bmi etc

lynnacuff

okay,here is my situation currently on 1200 calorie, carb 35% fat 30% protein 35%, went onto fitness frog site and used their calculators, i am 5'4", 54 years old, mild copd, and 157 lbs, would like to get to 125 or 130 and not so squishy, i do ride a bike appx 1 mile a day 2x a day (daughters house and back) 1st ride i dont push 2nd ride i do at least moderately have zumba and another dance one but i am having trouble with the moves,(grace is not my name) anyway here are the numbers.
TDEE-1896
CALORIE CALCULATOR-1922
BMI-26.95
RMR-1362
BMR-1379
LBM-42 POUNDS FAT 115 POUNDS MUSCLE

STARTED THIS OUT BY JUST WATCHING WHITES AND SUGARS RIGHT NOW I AM EATING AT 1200 TRY TO KEEP CARBS LOW, CAUSE THEY SEEM TO JUMP RIGHT ON THE HIPS AND BELLY. HAVE READ EVERYTHING BUT ALL I AM NOW IS CONFUSED.SHOULD I BE EATING MORE LESS OR WHAT

drmerc

white food is not evil (no racist)
carbs are not evil

BMR looks right, I would eat between 1500, see what works for you
I'd increase your carbs and decrease your fats more