Hoya thrive in very well-draining soil for Hoya. Hoya are epiphytic plants, which means they get a lot of moisture and nutrients from the air through their leaves.
Use a well-draining soil and provide humidity (humidifier or mist from a spray bottle) between each watering. This will keep your Hoya from getting over-watered and rotting due to soggy roots.
You can use a pre-made succulent and cactus soil with some added perlite to increase the drainage. Many people like to use a mix of orchid bark, potting soil and lyca for their Hoya.
If you do not have access to a succulent and cactus mix you can make your own by mixing potting soil with perlite, pumice OR vermiculite. You can usually find at least one of these at home improvement / garden stores. This additive will make the potting soil a well-draining soil which will enable your new Hoya plant to thrive.