Here are some plant care tips for growing your Cactus indoor.
Place the cactus in an east-facing window for moderate light and some direct sun.
The rule of thumb is to let the soil dry completely before watering them again. In a very hot environment with an effective drainage system, they may need to be watered more frequently. About every 2 to 3 weeks. As the weather gets colder, you will need to water them less.
Maintain an optimal climate of 18-20 degrees celsius.