It is much easier not to get or give in to cravings--your stomach simply won't hold much. It's true that your appetite will return eventually (mine has). but you'll still have a tiny stomach and will be full/satisfied on very little food. Some days I feel like I'm doing nothing but eating, but then I actually calculate what I've had and it's still only about 1,000 calories (this is after nearly seven months). Today, for example, I had cottage cheese and cantaloupe for breakfast, high-protein oatmeal for lunch, and half a can of chili and some toast for dinner--yes, too many carbs. But not that much food or calories generally.
The sleeve is a tool that helps you (a lot) for a year or so, during which time you can learn new habits while losing a significant amount of weight. I'm not sure how much restriction I'll feel down the line, although reports on here suggest it varies for each individual. But I'm already used to thinking about the need for the protein first (and I know I need to eat more veggies--but that's always been a challenge for me).
A couple of things: don't stress yourself out trying to predict the future. Know that different people have different levels of pain, hunger, etc. Accept that the first month or so won't be much fun. Know that you can blow this if you try hard enough--but know also that this is absolutely the best chance of losing significant weight, keeping it off, and learning how to live like a "normal" person.
For some positive encouragement, look at some of the threads with before/after pictures. That'll keep you motivated!
Good luck!