I believe the human brain is best capable of picking up a language by being subjected to it. Hence I prefer reading and speaking over artificial practice, at le

I believe the human brain is best capable of picking up a language by being subjected to it. Hence I prefer reading and speaking over artificial practice, at least beyond bootstrap level. Here's what worked for me: 1. Get an acceptable grasp using traditional methods (you are already here). 2. Read about three books while looking up every single word you don't understand. This may be easier when reading on a tablet. Warning: This will be slow going. Perhaps pick some favourite books you've already read. 3. Read another twenty or so books, but you shouldn't have to use the dictionary very often. Concentrate on flow. This will take care of your vocabulary and grammar. To master conversational English and pronunciation you have to speak to people, but the foundation you built above will help. Four months is an ambitious goal if you're looking for complete fluency, but you should see solid improvements.