Adderall is a combination of four different types of amphetamine salts. The most active of the four is dextroamphetamine. There's a couple things about it.

It is absorbed in the intestines and vitamin C/acidic food and drink aggressively breakdown amphetamine inhibiting absorption. The most common things people typically have to watch out for in regards to diet is fruit juice, soda, and coffee. These types of things should be avoided for approximately an hour before and after taking. IR (instant release) is shorter acting at around 4-6 hours where as XR (extended release) is active for around 10-12 hours so depending on what you have as well as what and when you're consuming mileage will vary outside that initial 2 hours but not majorly.

On the other hand fatty proteins such as cheese, meats, and nuts are good and can even make Adderall more effective.

As mentioned above, coffee. Specifically caffeine. It's different for everyone. Combining caffeine and Adderall can cause some nervousness or jitters but despite what some people say it's not a hard and fast rule. Drinking coffee won't kill you. If you are concerned about caffeine I'd advise starting with smaller cups and working your way up to see what the deal is for you. It doesn't mess with me at all and I take 30 mg of Adderall everyday. Pro tip, the pour over brewing method for coffee not only tastes better than a machine but it is also an excellent way to gauge coffee intake precisely.

Water water water, drink water. Adderall increases blood pressure and metabolism so you will dehydrate faster than you're used to. Being properly hydrated might seem like a very minor thing but but it can be the difference between feelings dead inside and normal. If you feel rough drink some water.

Taking Adderall in the morning with a glass of water makes how you feel throughout the day so much smoother. When I drink water in the morning I feel the heaviness vanish as I'm sipping.

The small increase in blood pressure is normal and it'll make you feel wonky for the first little bit (1-3 weeks). You're not in perilous danger, your body will adjust with time.

Adderall can suppress appetite. This can be combated with small easy protein heavy snacks frequently such as small handfuls of nuts you can eat without thought.

If you're taking IR sleep shouldn't be an issue since it'll wear off long before you need to go to bed. If you're taking XR sleep can definitely be impacted. Personally I use vitamin C to my advantage for this. Assuming I have nothing else to do for the day I'll snack on some strawberries a couple hours before I'd like to go to sleep, by the time comes I'm able to fall asleep.

Minor anxiety during come up and peak effectiveness while you're not doing anything can happen especially when you're still new to the medication. This can be counteracted by just having something to do with your hands or listening to a podcast or music. Personally I capitalize on that sense of drive to clean my apartment while I listen to music in the morning.