JKD isn't just taking from multiple arts (that is what Mixed Martial Arts is), it was specific moves that Bruce Lee took from different martial arts and combined into his one system.
Oh, sorry. I said I didn't know much about it, lol.
I read up on JKD a little bit, and it's a little wierd. It doesn't seem like a style, really. Each individual practitioner can add his own thing to his fighting style, and can adapt at will. No Katas, just all out sparring. It doesn't really seem like a style, just a self-defense class where you can do whatever's necessary to survive. The idea is really good, but how much can one person accomplish, you know? One practitioner might stress more on stand-up fighting, while another might be mostly ground. It's wierd. And if you try evening it out, you won't really be a good fighter until you practice for a very long time. Dunno, I might be wrong, just my thoughts. Don't kill me for them. XD
Go for a mixture of boxing and BJJ if you want to be able to spar more and possibly compete. A few months of MMA will be adequate for basic self-defense, and you'll have the opportunity to participate in the sport of MMA.
Yeah, except I would replace boxing with Muay Thai. To get some kicking in there...just in case. You really don't use many kicks in real street defense...and I don't mean you can't use them against some punk that messed with you at school, lol. I mean like when you're confronted by a dude you've never seen before, or if you step on someone's foot in a party.
P.S. I'm new to this stuff, too. So everything I've posted so far might be completely wrong. However, I think that's the right way to go...it goes well with everything I've ever read or everything anyone's ever told me.