LSRW
Nobody can listen and understand a new language, except for very young kids. Therefore, listening to 10,000 hours of sounds and sounds only means nothing and makes nobody learn much. Speaking is based on some input, either L or R. If one listens and knows nothing, one usually reads and knows nothing. Therefore, one cannot speak anything by only listening or by only reading 10,000 hours anything one does not know in the first place. Reading new symbols is useless as well. Let one read Abisinian for 10,000 hours, one learns nothing. Now about writing, if one listens to nothing, and reads nothing, how can one write anything.
Conclusion
一句话,掌握大量的词汇!!!