First, there are multiple ways to learn another language. One is the Rosetta Stone, which I do not recommend because it is very limited in its scope and the software is very fussy (both in installation and in terms of your speech). There are other ways to learn languages, one of which is simply using the Internet to find YouTube videos and order course material and books in the target language (preferably also in your native language until you reach B2/C1). The drawback is obvious: Unless you are serious, you are not likely to stick with it long enough to reach A2.
This washtowel system is worse than any other way. Even worse than the Rosetta Stone. How? You are simply taught what is needed to function as a jokehovian witless, nothing else. You will not get the vocabulary needed to rebut the washtowel--just enough to function in that religion and preach the rubbish to others. This gives false fluency--you might be fluent in the phrases needed to preach, but you could not pass a B2 exam in general proficiency. (Let alone at the C1 level.) Not to mention, you are indebted at the astral level, if not also in the physical level, to this dangerous religion.
I would rather take the classes in a school, online or in person, or put up with the limitations of the Rosetta Stone or the difficulty of organizing your own program. (Which, by the way, can take you where you wish to be, provided you can find the books written in your new language to advance and a good unabridged dictionary.)
