Where/How to learn vietnamese?
Regardless of price, RS would not be a tool for a beginner. RS is a vocabulary builder. It doesn’t matter how many words you know, if you don’t know the core of the language, you won’t be able to do anything with all these random words. If you want a method that focuses on conversational, Pimsleur is the reference imo. You will learn to train your ear to understand natives (an essential part of early learning often overlooked by other methods), develop very good pronunciation and acquire the core structures and grammar of the language. I find Pimsleur to also be a true confidence builder for new students. Their courses are also almost half the price of RS (check Amazon for best pricing.) You can do their course on the go, in the car, on your ipod, etc., which may or may not be an advantage to you. It’s a great way to start your studies. Good luck.