Im also new to the growing cephalotus, when i first got mine a few pitchers yellowed up and died. A month later it has new growth, not a whole lot but for a month its enough for reassurance that my ceph is going good
Im assuming it was just adjusting to the climate in my area, I keep mine outside just sitting in a bit of water on our outside table setting. Not in direct sunlight but in the morning cool sunlight hits it for about an hour or two. I live in western australia so it hits 40 degree days sometimes but it tolerates it being outside and shaded with that morning sun.
If there is one thing i have learned its to not get caught up with the excitement of getting a ceph, just leave it for a couple of months so it can adjust and your good to go