Here is a list of all the information you can read on this topic.
If you have a residence permit and are between 18 and 67 years old, the government requires you to learn Dutch and get to know Dutch society. This is called civic integration. Read here when and how to start civic integration.
You can practice Dutch in different ways. If you would like help learning the Dutch language, you can find more information on this page about how and where you can get help.