There are many different opportunities to learn German in Germany, abroad and online. Below you can find a small selection of German courses in Germany and on the internet:
“German to go”: Learn German for free with Deutsche Welle »
Goethe Institut: German courses in Germany, worldwide, online »
Preply: Learning with a German tutor online »
Learn German online with Udemy »
Community colleges, so called “Volkshochschulen”, exist in almost every German city), e.g.
Other German language courses, e.g.