It's normal for this plant to drop some leaves during shipping. It will quickly grow new shoots once it settles down. The first 2-3 weeks, try to keep it in moderate temperatures out of strong sunlight.
Start your plant in a pot about 50% wider than the pot it's currently in.
Repot gently to avoid disturbing the roots. The first month, ensure that the original soil ball stays moist (not just the surrounding soil).
To avoid burning or wilting, start it in filtered sun and gradually move it into brighter light over a period of several weeks.
Parrot's Beak has average fertilizing needs. While it's actively growing, feed with a general-purpose fertilizer that contains micronutrients, following the dose on the package.
Try to keep the soil evenly moist of the time (but not constantly saturated). Don't let it dry out.
Mature plants are reported to withstand a light frost, but i recommend protecting it from frost the first year.
In very hot climates, they should probably have some afternoon shade. To keep the roots cool, keep the pot shaded, perhaps by placing it inside a second pot made of clay.
Pruning isn't necessary for this plant, but you may remove any undesirable branches. Feel free to tie the branches upright if you don't want them to grow sideways like they normally do.
Repot as needed to a larger container. An adult plant may be kept in a 5 gallon (20 liter) pot if it's occasionally pruned shorter.
Bugs to watch out for - spider mites (tiny "dots" under the leaves), mealy bugs, thrips, caterpillars, and slugs/snails. Try using insecticidal soap on insects before using stronger remedies, since some may harm the plant.
Enjoy your plant!
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