Dutch classes - urgent (Amsterdam)

I'm moving to Assendelft (near Zaandam) and need classes for learning Dutch, written, listening and spoken. I'm Brazilian/Portuguese and have advanced levels in English and in French. I tried the Groningen online course, but haven't time to go further. I prefer traditional courses, it's easier for me to learn quicker if I understand the structure and logic of the new language. I'm bad in memorizing, that's why I need any traditional method of studying the language. If so, I can learn very quickly. Does anyone can help me?