Congrats on making the decision to adopt! Absolutely get two. Preferably two of the same litter. I know they're supposed to be so independent, but they really do get lonely. Besides, watching them play together is a hoot. They do the craziest things.
There are some things cats need:
Instinctual needs are to hunt, to scratch, and to have privacy. They'll thank you for a covered litter box (do you like people watching you on the toilet?), and you'll like it, too. Stepping on kitty litter all the time is annoying. Get a scratching post.
Physical needs are: Nutrition, exercise, hygiene, safety, rest, and stimulation. Like every other pet, they need some attention. Ephemeral may not like kitty vids on YouTube, but my cat will watch them by the hour. I just need to teach her how to start them over by herself.
Emotional needs seem to be lying on your keyboard when you are busiest writing. Otherwise, independence, interaction, and treats.
I'm not actually this smart. I got this from the label on a cat toy I bought. The brand is SmartyKat. The toy is a fabric tube / tunnel, and my cats looooove it. They weren't so crazy about "Thing in a Bag." They like mice on a string, and any insect they can chase around the house and torture until it's dead.
Save your pennies and plan to have them neutered / spayed when they are 6 months old. That's the responsible thing to do, and you won't have to worry about having to find homes for the kittens. Cats can live a long time, you know. My sister had one who lived to be twenty-six! Good luck, and post a pic for us to see, okay?