Not just in America either Amber - unfortunately it's true of the UK too - it's generally harder to find a home for a black cat as they're not considered attractive (for some bizarre reason!)
You have some fun in store, if this is your first kitten, that's for sure.
Some sensible tips are to make sure you can "kitten-proof" your home insofaras possible. Try to think like a tiny kitten - where would you go, what would make good hiding places or exciting places for exploration? Are they safe? What cables, wires etc could pose a hazard? Are there any gaps or holes through which a kitten could squeeze?
If so, can you block them up albeit temporarily.
Never leave the loo seat up, or a bath unattended.
Watch out for stairs (not our first kitten by any means but just two years ago when Mac was a young un he slipped through the banister rails and fell around 6 feet, only too have his fall broken by our sofa, but I can tell you my heart stopped) and tell everyone to keep an eye open for a lightning quick figure beneath your feet - kittens can get badly injured if they're trodden on.
Keep doors and windows closed when the kitten's about, or make sure you have mechanisms on windows to prevent a kitten squeezing through (they can access incredibly small spaces).
Make sure the other cats have a place they can retreat to, if kitten playtime gets too much. Introductions should be made carefully out of deference to your existing cats. Most of the time they'll administer swift discipline to any unruly youngster, but seldom inflict damage, but they will appreciate having a space they can relax into without being ambushed by the new kitten.
Meals should be small and regular. Four to five small meals a day are about right, although some kittens will eat more, and some less. Keep an eye on your new arrival to make sure she's eating and drinking without assistance. Show her where the litter tray is and pop her on it after she's enjoyed a meal - it will encourage her to "go".
Ross used to use his tray, then scrape litter over nothing at all, leaving his poos proudly displayed to the world.
We had to show him what to do the first few times, in terms of covering it over. He's still a bit hit and miss with this even as a fine young adult cat.
A kitten check at your vet is a good idea - he can make sure she's in good overall health, and you can arrange for her vaccinations and discuss when best to book her in for neutering in the next few months.
Above all, enjoy the fun, laughter and tender cuddling moments which will present themselves. Having a kitten can be one of the best things in the world, especially as you watch her character develop and see the promise of the yong cat she'll become very quickly.
I think she sounds like she's fallen on her feet to get a home with you, and hope Frankie Mischka and Milan all find her as adorable as I'm sure you will. Have you thought of a name yet?