Hi Lisa,

Your plant is a type of Peperomia Plant. Some call it a Peperomia caperata red and others refer to it as a Peperomia argreia (Watermelon Begonia). All agree it is a Peperomia! There are care instructions for a Peperomia Plant in the Popular HousePlant section of the website. The picture there is of a different variety, but the care is the same.

https://www.houseplant411.com/houseplant/peperomia-plant