Congratulations on your acceptance!
I was blessed with a naturally strong stomach, but occasionally make use of some Vicks. Sometimes we get peppermint oil from the pharmacy, dip gauze in it and clip it to the IV pole. More often we use a bio-odor eliminator spray or small electric air filter. Unpleasant sights just take getting used to.
Self care is very very important! You'll want to learn what works for you if you don't know already. For me it's prayer, singing, hugging my kids, watching funny videos, etc. Sometimes the emotionally difficult cases sap my physical energy, so I'll give myself permission to sleep longer when I get home.
Unless my patient is actively trying to die, I also take my dinner break. I stay hydrated at work too -- none of that "no time to pee" stuff.
Keep your head down while in school, but enjoy the ride! You're fulfilling a long-held dream.