If you want to learn, you must work for it. This does not mean the work must be boring or even painful, but still, there's some constraint. You will remember many words rapidly, but for the few die-hards that always slip through your memory, you need to find mental hooks to remember them. Same things for difficult syntaxic patterns, you can learn them by memorizing grammar rules or by inferring from phrases, but still you must get the picture. So, if your idea was to get into the country and think the language will come as quickly as the turista, you will wait a long time.