I can totally relate. Raw food is so much lighter than cooked food and that lighter feeling can make us feel so-o-o hungry at first!
Have you found something that fills you up at breakfast yet? Some people do fruit smoothies with some young coconut meat and milk in it, some do green smoothies with an avocado in it, and I have heard some people eat huge salads for breakfast. Maybe eat a raw bar last thing at night for a satisfying treat. Or at first, I would have a banana dipped in raw cocoa nibs for my dessert every night. It was very satisfying at the time.
You might need a couple handfuls of presoaked nuts everyday at first and an avocado. But try to fill yourself up at each meal or snack so you will be able to wait at least 2 hours before the next meal or snack.
Good luck and let us know how you are doing! Remember that high raw is perfectly acceptable at first and also sprouted grains can be helpful to fill you up. There are even raw oat groats that you can soak in hot water overnight for raw oatmeal in the morning.