Hmm, not really an expert on the subject, but I'd suggest learning both at the same time. Take some days to learn "grammar and sentence structure", and another days to learn and understand "basic kanji and vocabulary".
I say that because, when you only learn about "grammar and sentence structure", you might lack in Japanese vocabulary as to understand the sentence given and unable to create own sentence.
However, if you were to only memorize "basic kanji and vocabulary", then you might be confused when the Kanji used is being conjugated.
April 27, 2016 at 11:02am