With 100 million native speakers, German is the most commonly-spoken language in Europe. Around the world, 14.5 million people are learning German as a foreign language today. There are many good reasons for studying German, and a large number of resources, online and offline, to help you gain fluency in the language of Goethe, Gauß, and Grönemeyer.
One possibility to learn German is attending a language course at the Goethe Institut.
You can also learn German via the Internet, for example by taking a course with Deutsche Welle