So, you can have dressing - if your protein is chicken, you get 1 fat serving - so 1 teaspoon of oil, a little more if it's premade vinaigrette. I've learned that I don't really need the oil if I can have lots of good flavored vinegar on my salad with salt & pepper. See what works for you.
First day - drink lots of water - whatever the problem, water is often the solution. It helps with hunger, headaches, and dizziness. And most people find that MF food makes them thirsty. I have no problem drinking 100 ounces a day.
Eat the dill pickles if you need them. If you're really starving, eat an extra MF meal. It's better to have an extra bar or shake than eat more "real food".
Don't try to give up caffeine right now - you're doing enough.
Plan on being a little cranky, possibly headachy, or tired for a few days. It kinda depends on how many carbs you've been eating - going into ketosis is carb detox. I had a pretty easy first few days, but everyone is different. If it's bad, it WILL get better - hang in there and drink more water.
Good luck - you can do it!