To study Japanese first, we have to learn the Japanese sentence structure, grammar basics, and word order.
A language is not just its vocabulary words or textbooks full of common phrases. You absolutely should learn the basic phrases, especially if you will be visiting Japan with only a month to learn how to speak or read a new language. But it’s also important to get a handle on Japanese grammar and sentence structure. This way, you will at least have a little bit of information memorized to help in a contextual situation where you are not entirely sure what someone said or how to respond. Understanding or studying any language is not an easy task. Studying Japanese will take a lot of work but it is not so difficult. Being literate will require hours and hours of studying, especially the kanji. I am not even fully literate.