I don't think JPC is enough, simply because you don't learn grammar here at all. It is good for vocabulary and kanji, but there's more to a language than that.
Tae Kim's Guide to Grammar is supposed to be really good, and there are tons of youtube video that teach basic Japanese! There are also some good books out there, most people start with either Genki or Minna no Nihongo (though I have heard the latter is a bit more difficult).
It is also important that you practise your skills actively, that is by writing or speaking. Now this is always a bit tricky in my opinion, because depending on where you live there is no one who can talk to you in Japanese. But I've heard that lang-8.com is a great website for writing and being corrected by people who know the language (I haven't tried it myself though).
There are a lot of apps (Anki, Memrise, Obenkyou etc) which are neat for learning Japanese on the go. Some focus solely on kanji and vocabulary as well, but some cover more than that.
To sum it up, it is always good to use more than one tool to learn a language. Each tool has their advantages and weak points, so make sure you cover as much as you can. Basically, absorb as much as you can, just like a sponge! :D
I hope this was helpful and good luck!!
PS: Excuse any weird typos...it's 5:40am here and I should be sleeping haha
August 13, 2014 at 12:39pm