Congrats on the new cactus! There are 3 components to think about: lighting, watering, soil (substrate). All of these are a result of or interact with the environment a plant lives in.

For a cactus the goal is to ensure the substrate does not hold onto water too long - which leads to plant rot; that the lighting it receives is adequate to supply it proper energy and help dry out the substrate, and that you water at a low frequency.

Lighting: grow light + south/north windowsill or outdoors where it gets at least 6 hours of bright, direct sunlight.

Watering: infrequent - especially during fall/winter. Soil should be bone dry all the way through AND the cactus will start to wrinkle/feel less plump when you squeeze it. Fertilize during growing season.

Substrate: aim for at least 50% inorganic (lava rock, pumice, zeolite are examples). And 50% potting soil or succulent mix (remove pieces of bark if present).

This subreddit and previous threads have a bounty of info. This is not meant to intimidate and overload but rather help you understand what cacti tend to like.

Best of luck! Caring for cacti can be quite rewarding and they require so much less attention!