You need to feel the culture: the music, the people, the food, the place. This can't be a chore, a mathematical problem or a silly game in an App. It's an amazing challenge and the reward will be very beautiful so you need to be all in.
How many language purists don't post on my blogs criticizing this or that minor accent point? The result is that we hear way too much about accent and way too little about what really matters; communication.