Hedgehogs are not playful. You will be pricked. A lot. A whole lot. And you may be bitten. Unless you breed them, I don't believe you can own one legally in CA. That's the way it works in GA.
Hedgehogs can be sweet, and sweet is a relative term. Even the sweetest, friendliest hedgehog is hiss and snarl when disturbed and curl up in a ball. Once they see it's you (if they trust you), they usually unfurl and lay their quills down. The friendliest hedgehog will still prick you. It's what they do. They are very shy, skittish animals and the slightest thing, such as someone walking through the room, changing the TV channel, or sudden typing across the room will scare them and they'll hiss, curl up, and erect their quills. Have you ever been around someone suffering from nicotine withdrawal? They are really irritable, edgy, and the slightest thing pisses the hell out of them. Hedgehogs are like that. The slightest thing scares the hell out of them and they quill up and start to hiss and snarl. Sometimes when they're really pissed they make this barking/coughing sound. They are just as easy to care for as a hamster, but you must keep them warm at all times. I use a heating lamp AND heating mat, and in the winter she stays in the living room next to the fireplace. You can't let their environment get below 73 degrees or so. They are about as smart as hamsters, which is to say very dumb. You can cuddle with them, although they aren't cuddly. If you want to let them fall asleep under your neck or something like that, be prepared to be stuck if a sudden noise wakes them up. When you're holding a heavy hedgehog and it's quilled up, it really does hurt. Whenever I take showers, you can see the great multitude quill marks on my fingers. You can't take it personally
She's a very sweet, affectionate hedgehog. They've only been bred domestically (meaning in the US) for just over a decade. They are bred for color and temperment, but they are still very much wild animals.
Get a hamster. You just made a huge leap from deciding you want to do saltwater, to wanting a hedgehog. It sounds to me like you just want an interesting novelty pet on a whim. That's the way most ten year old are, and at ten I was like that. Very impulsive. Even if they were legal there, I'd still tell you to get a hamster. Keep it alive and happy for a couple of years, then think about getting a hedgehog whenever you figure out if you can get a license or move. Besides, hedgehogs cost about 30 times more than a hamster. And the smell of their poop... oh God it's ridiculous. Other good pets are freshwater fish, hermit crabs, small rodents (gerbil, guinea pig, rat, etc), something like fire bellied toads, etc.