I found that eating carbs made me so so tired!! Now i eat caveman, things are much better!.... you might find you have a lot more energy if you try it.
Make yourself a list of meals so that when you go shopping you know what to buy, and when you get home you know what to make. I often found in the beginning i didn't really know what to eat, so i would grab the first thing in the fridge

let us know how you're getting on
Nicki