Here's what I do when introducing a new cat/kitten to the household. We have a spare bedroom that I can keep the newbie in. Raven will know there is another cat in the house. They will smell each other under the door. If possible, put Raven in a bathroom or another bedroom and let the kitten wander the house without Raven around.
Depending on how well this goes....we put up a baby gate across the door to the newbies room. That lasted a couple days before the kitten (both Paizly and Jax) learned they could jump the gate. But by that time things were fine. Just keep a close eye on everyone. We were also introducing two dogs to the kitten as well.

Take this all as slow as needed. Sometimes it can take a day or two, sometimes a week or two. Just depends on the cats.

Of course, who am I to give advice? Paizly still hisses and growls at Jax and Jax has been here for almost 2 years.

I can't wait to see pictures of the kitten.