It’s unlikely that your ferret will be running free, especially as a kit, so that the cat and the ferret have time to get to know each other. While some may disagree, I feel it’s best to have one ferret-proofed room, and to keep the ferret in there. Ferrets cannot have the run of a house, like many cats. My two ferrets are confined to their spacious cage about 18-20 hours/day, and have the run of my home office at other times (preferably when someone is present). If you think that cats sleep a lot, wait until you see a ferret. Plus, unlike the cat, ferrets stay asleep.
You will have to socialize the two, and hope that they click. This includes, as Ferret Herder noted, nip-training.
Some other, unasked for advice: Do not use clay or clumping cat litters for ferrets. For best results, use a recycled paper litter, such as Yesterday’s News, or a wood pellet litter. Yesterday’s News cat litter works, although the same brand’s ferret litter is better as it’s less dusty.