Hey, question about getting two cats together (first two photos are of the new cat, last two are of our old lady)

[u/NumberOneVoloFan]

And just to let you know, I am a minor and still live under my parent’s house.

Okay, so basically, the kitten is still in her months (I forget when because I have really bad memory) and I think our old lady is almost 10.

We’re trying to introduce them to one another and our old cat is nothing but hostile, obviously. Cats are cats.

I just need advice on how to get them together so Rose (our old cat) is actually fine around our new cat. (Also, I have a close bond with our old cat, and recently I have been protecting Blossom [our new cat] from her. Could this perhaps destroy it? Just an extra question, lol.)

Thank you!!!