You can always get a new plant. I was passed on plants too , but since they were old and not succulents i couldn't take care of them properly.
The plant you have is called trichocereus pachanoi. Its common name is the "san pedro" cactus, given its popularity among mescaline addicts.
However, mescaline rich specimens are very rare in cultivation(legaly regulated), and its also popular for its fast growing speed, ease of care, and use as a grafting stock for difficult plants.
This should be a fairy easy plant, as long as it has lots of light, the soil drains a lot, and is watered properly.
