The best method in learning to speak a new language is still going to a class/university where they teach that language. Getting help from a professional with the experience both in teaching and the said language is still the most easiest and effective way.

However, not everyone have the time nor the money to take such courses. That is why I am recommending you to try the mobile app Duolingo. The app has a "somewhat" syllabus in there wherein you start with common phrases then continuously branch off to other categories. 

They will even try to grade your voice if you are pronouncing it correctly.