learning dutch
によるポスト S. W. に アントワープ フォーラム
Usually when you are already registered in Antwerpen, you'll get invitation letter from the city to go to Atlas. It's an office where they help new comer. The city will give you free Dutch courses for some levels.
For others, you can browse in internet. www.livemocha.com for example. It's a free website to learn a lot of languages.
I hope it helps.