Hi Breanna! Well done on making this decision and it is totally achieveable to lost 6lbs a month safely. Any more and it may be too much but this is very realistic.
You may find that 1600 calories is enough for you but having that extra 400-500 calories in the first week of your new meal plan is a great safety net for you to add in more fruit, wholegrains or protein in case you are feeling a little less than satisfied with your meals.
Remember it doesn't have to be complicated but be sure to have extra fruit and vegetables or perhaps a couple of hard boiled eggs around for those emergencies when you feel you need some more fuel.