First, take 5 deep breaths and let out that anxiety. It is normal to feel nervous going into any new job because you're walking into an envirionment you're not used to and it feels foreign. When I was fresh out of CNA school 5 years ago, my first and still current job is at a nursing home and I work nights. I was one nervous chick. Never had any real job experience at all. Just go in tomorrow, take a deep breath before entering and do your best to learn everything there is to know during you orientation. There is a lot of new information and policies that the LTC facility will have, so try to pay attention and engage in the training. I don't mind working in LTC workplaces, depending on how many residents you have, it can get stressful during the day shift/evening shift. Night shift can be hectic as well. There will be some nights that a few residents don't sleep at all and they are moving around in bed. Sometimes we have to get the resident up and come sit with us at the nurse's station because they are almost going to fall out of bed. Then there will be some nights where it is calm and there's more free time. At my facility, we have only 40 residents, all 1 floor. There are 2 aides and 1 nurse, and the main duties we have to do are 2 sets of rounds on the residents. The other aide and I go down each hallway together, so that when we do our 2-assist residents, we are close by. We also get 4 residents up and dressed between 6:30 and 7:30am, and that's the end of my shift. We have other small duties, too such as filling up new water pitchers with the new date and passing them and stock gloves in the resident's rooms, and answer call lights.
I think the change in facility won't be too dramatic since you've already worked at an assisted living place, so you have some idea of what duties you'll have to do. I wish you luck and to just relax!