Q.orchids
What kind of a pot should one buy to plant an indoor orchid. Is it important that the pot have drainage?

I like to recommend clay pots and they make clay pots designed for Orchids. They are wider and have additional drainage holes on the sides of the pots.
Drainage is very important. Never use a pot without drainage holes.
Here is an article that will help you.
https://www.gardeningknowhow.com/ornamental/flowers/orchids/repotting-orchid-plants.htm