Hi, okay so I should probably start out by saying the first time I started tending to plants was less than a month ago, so I have almost no idea what I'm doing. I received this plant from my grandma, who grows a lot plants. It was already potted in something with drain holes at the bottom. I don't know how well draining the soil is, but I try to only water it when it's dry to the touch, though sometimes I do forget. I keep it in bright, direct sunlight (though I've moved it away from the direct light for now). Recently I have noticed the hen has started to turn wrinkly and dark in color, and it's beginning to spread to some of the chicks as well. I have no idea what to do, so any advice would really be greatly appreciated!

Hi YouKilledKenny, and to NGA. So glad you found your way here.
That sure looks like rot, which means there is something wrong with the drainage or soil type. I would detach all the offsets (babies) and remove any damage areas and replant them.
It looks like your container is sitting in a dish, which means that it is sitting in water every time you water. I don't think the main rosette is going to make it, but the offsets should be fine.
Also, these are not house plants, and do not like to live indoors. It would also help if you tell us where you live, what state, growing zone? Do you have a place outdoors to grow your semps?

Lynn