We (me and my teens) used Duolingo for a few years and.. didn't really get that far in actually being able to speak. It's kind of mind-blowing that they are the market leaders. In retrospect, I think of it more like an addictive language game and not really a good way to actually learn to speak.
If you're really interested, shoot me an email.
Latest in a long line of scams for learning a language. Goes back to cassette tapes and records. The only good way is the natural way: immerse yourself in it.
Some cassette tapes work very well. Pimsleur for example.
You can use it as supplement or do it standalone on your commute before a trip and end up with good pronunciation, vocab and a conversational skills.