This image is only for reference.
An ideal houseplant and an indoor plant which is also call Valentine Hoya for its shape and forms a special novelty gift.
This plant needs a reasonably light room or a shade near north side window.
Sweetheart needs to be watered only when the soil seems dry and not over-watered so that the plant gets rotten. With its succulent qualities, it's quite adept at storing water.
Most temperatures you find indoors are fine. Growth will slow or stop if things get cool. Should be re-potted when there is new growth.