I think, want to learn Chinese is not difficult, difficult is unremittingly learning. And you must be interested in Chinese, because, the interest is the best teacher. I'm Chinese, I hope to improve my English, because my English is very poor. I have some Chinese, so, if possible, I hope you learn from each other, help each other.

There is no easy way. You need to do all of them but if I can just choose one then I would say probably focusing more on memorizing lots of new words at the beginning would be helpful. Children pick up new words just by listening and communicating with others but as adults we need to put more couscious effort to get the same result.

I don´t think there is an easy way to learn chinese. you have to practise both listening, speaking and reading. The first thing you should do is learn pinyin and its pronounciation, after that you must start learning characters and vocabulary. I would not try to watch movies at the begining, you can find on internet many podcasts where you can download audios, you can also search for chinese radios on internet where you can listen to news and songs in chinese. There are also many sites on internet where you can learn chinese grammar, basic phrases and get a list of most frequent characters and words.

The most efficient way, I think, is to communicate as much as possible with native speakers.

live in china for a month at least