The Michel Thomas learning audio programs are fantastic for getting a grasp of the language.
If you read and read and watch and watch TV,without analyzing what you do you get naturally the feeling of the language, without the suffering.
Mark Twain did what 99% of Germans,Austrians,Swiss are never going to do. Stop and overthink it too much.
That was probably the most reasonable way to learn German outside Germany in 1880. It is not today.
If you are interested in learning any language, I recommend the book "Fluent forever". It tells you how to start leaning a language and all the resources to learn on your own.