I'm on the fence about buying this, I've never played a game from either of these series but it looks fun. Would it be too confusing for me or should I get it anyways?
Well, if you have the possibility to do so, then I'd suggest downloading the demo for
Phoenix Wright: Ace Attorney - Dual Destinies. It's a Phoenix Wright game and the demo should give you a good idea of what the game is like and whether you'll like it or not. There are no demo's for Professor Layton but if you like puzzles and riddles, then you might like those games.
As for this one, if you've never played either series, then I'm not going to say "Buy it, you won't regret it!" Thing is that you might not like Professor Layton's gameplay, or you might not like Phoenix Wright's gameplay, or... you might like both, but not the combination of the two.
I'm aware that's not exactly helpful, but I just mean that it's kinda hard to say whether you should get it or not. I talked to a friend about this game who absolutely adores the Professor Layton games, but Phoenix Wright just isn't her cup of tea, so to speak.
Also, you should know that this game is quite dark. If you're familiar with Phoenix Wright, then that won't surprise you all that much. But if you're only familiar with Professor Layton, then it might not be what you're expecting. In your case, however, it'll depend on whether this would bother you or not. But don't worry; there's also a lot of humor, though, so it's not only and always dark!
So, in short; try the demo if you can and I'm sure other people will give advice as well, so you should have some more info soon. ^_^