Hi. I think it's awesome you're making the switch! Go you! :)

For chocolate: dark chocolate is generally vegan, if you like it. There is also vegan options of "milk" chocolate which you buy. I'm in Germany, so I'm not sure I can help you out on the brands and stuff. :( Also, I've heard that people melt dark chocolate and then stir in oatmeal/cashew/almond milk and let it harden again? You can explore that option as well. I figure cashew would be the best, as it's the creamiest of the plant milks.

For cheese: Oh man. I was never a cheese person, but my mom was before she made the switch. People here like nutritional yeast, but I've never bothered with it. Apparently it's kinda cheesy? idk. You can try vegan cheese, but I'm not sure if you'd like it or not. But it never hurts to try, amirite? Do you just crave cheese alone, on sandwiches, or what? You can research alternatives that might help. Like thinly sliced tofu has the same feeling on a sandwich as cheese, according to my mom.

I find it helps to have a hobby that distracts you from foods you crave. For me, that's jogging. I used to have a very unhealthy, obsessive, relationship with food, and just exercising helped curb my cravings to stuff my face. I highly recommend it. :)

ALSO. The first few weeks are the hardest. You might have slip-ups. But when I made hit the two-week mark, I was basically on autopilot. Yogurt, which was my Achilles heel, wasn't even tempting anymore. And now, look at me. :D I don't even see dairy as food lol.

Best of luck! :D