Welcome Primadawn
I think the thing about ‘spending’ calories on eggs for breakfast, or whatever, is experimenting a bit to see what you need.
Lots of people seem to start their day with full fat yoghurt and a few berries, which keeps them going.
I am really happy with some white coffee (counting in the milk) and I don’t actually need or want breakfast till much later – at lunchtime! If I am at home, I have eggs then as a sort of brunch type thing.
So what might be best is to try a few days having a more calorie breakfast and then perhaps not much lunch and a reasonable size dinner.
Or you might find you are happier having just two main meals per day, with a much lighter third one.
But good luck with trying lots more things – loads of people here have tried stuff very doubtfully and then come on to say how much they liked them, and who knew?
🙂