Alyssa - NIce plant! Great acquisition! There are many different species in the Polyscias genus. The Polyscias fruiticosa is the most commonly available on and is commonly called Ming Aralia. The other varieties are often knick named after the shape of their leaves. For example, there is Fern leafed Aralia, a lace-leafed Aralia, a celery leafed Aralia, a dinner plate Aralia, and even a chicken gizzard Aralia. Someone seems obsessed with food!) Yours is a Polyscias balfouriana.
All of the various Polyscias species have pretty much the same care, although the Balfour can manage a bit lower light than the others. Yours is tightly potted and that is a good thing. It could be repotted, but I don't recommend it for another 6 months at least so that it has a chance to adapt to your environment. Definitely set the nursery pot into a larger, heavier decorative planter of your choice so that it doesn't tip over.
It should be located right in front of a north or east window or back a few feet from a south or west window. No more than a few hours of direct sun falling on the leaves each day. Water it thoroughly as soon as the top surface of the soil feels dry to the touch. Because it is tightly potted, the risk of overwatering is minimal. It does not need misting, but fertilizer applied at half strength once per month would be good.
Yours was grown from a Balfour stump to give it a somewhat bonsai look. That means it is intended to be kept relatively short and compact. It will not produce new growth from the base. If you just let it grow, it will become very tall and spindly without adding much to its width. There is nothing wrong with that, but aesthetically I think it will look better if it is pruned regularly to keep it more or less at its existing size and shape. Any stem can be cut back to any length without affecting the health of the plant.
Let me know if you have further questions. I love Polyscias!
