Have usually ended up killing all house plants given to me...Just been given a Moth orchid and want to change my wicked ways

...So have been reading up on how to take care of it..It says on the internet that "root rot will set in if the plant is allowed to sit in an old soggy
medium".
Does medium mean the pot or the soil??
Experienced gardeners don't laugh at the question please...I'm new to this! - and would dearly love to see this plant survive.
Am I also to immerse the whole pot in lukewarm water overnight once a week?
Your guidance would be appreciated.