The sad thing is that pure tobacco, dried, crushed, and smoked in a pipe, isn't even that bad for you. It's just smoke, just like smoking weed... yes it's bad for you, but not nearly as bad as cigarettes.
If you want to quit cigarettes, I strongly suggest vaping. It will take MONTHS for you to figure out what you like, and tune the nicotine content and vaping equipment to get it to feel just right, and it will still take willpower. But it worked for me, and I feel SO much better and I don't even have to give up glorious nicotine.
That, or do the pipe thing, but make sure you get good tobacco, not the shit from supermarkets and gas stations.
As for "spiritual career" I don't know what you mean. I know that weed/hash and psychedelics are used sometimes in occultism, but I don't often hear of tobacco use being essential other than for offerings. Could you elaborate?