Hello
@GreenBean17!
I`m afraid I think your orchid has a severe problem with black rot, which will kill the plant quite quickly unless you treat it fast.
This is a fungus, not a mould and it is usually caused by incorrect watering and misting.
Take it out of it`s pot and remove all the present compost (which should be special open material especially formulated for orchids) check the roots to see how much rot there might be. IF the root is still ok you could try the following -
Using a sharp sterile knife, carefully and cleanly cut off the leaves that show yellow/black and discard them carefully. you could use cinnamon to seal where the cuts have been made.
If the roots are not rotten, repot the plant in fresh orchid compost and use a transparent pot. Do not put the pot in a holder vase as it is in now, but on a flat saucer of some kind so that the light can get to the roots, and you can make sure that the plant never sits in standing water.
Water very well making sure the water goes through the pot and ALL drains away through the bottom. Only do this about once in two weeks at the most at this time of year. Do not mist the plants, or let any water sit on the leaves for any length of time.
Good luck.
We would be pleased to know how you get on.