There is no single book, app, or program that can magically insert Dutch into your brain, unfortunately. You need a person for this, you need practice, you need to
speak to someone! And you need to do it your way. Some people like books and a structured approach, detailed explanations on grammar, and going one step at a
time, while others prefer to dive in head-first and deal with these things whenever they come up naturally in conversation. There is no right or wrong approach
here. You need to discover the way of learning that best suits you, and we can help to find the perfect method for you, customized to whatever you need.