It does matter what they are in that yes it will make a difference to how quickly you loose weight and how healthy you feel during the process, and how sustainable the weight loss is.
Our body processes carbs effectively into sugars and stores it as fat if it's not burnt quickly through using energy. whilst your body is processing the carbs overnight, it isn't doing other things like processing your body fat (metabolising) so weight loss tends to be slow.
Ever heard the phrase 'eat like a king for breakfast, a queen for lunch and a pauper for dinner' - well that's what it means in terms of how your body processes foods and toxins. Big breakfast, medium lunch, and light dinner. You will burn the calories you eat during the day before sleep, and your body will restore, replenish and reduce overnight.
So without giving you the healthy food lecture, you can be a little more selective with when and how often you eat carbs to get great sustainable results.
A good day could be eggs on toast for breakfast, jacket potato with filling for lunch, lean meat and salad for dinner, fruit and yogurts in between. If you could get into a rhythm like that and vary your foods, focus on increasing proteins, it will drop off.
And water. Lots of water!
To loose 1 pound a week, you need to cut 3500 calories. Double if you want to loose 2 pounds a week which is really hard. A small amount of exercise can contribute quite a lot. There are loads of free apps available that help you track if you might find that useful too.
Good luck 👍