>>7802692Watch German films, read German newspaper articles, memorise lists of German words (using anki or something), do grammar exercises, talk to German people.
The first book you should read in German should be either the Lutherbibel or the Brüder Grimms Kinder- und Hausmärchen.
German is pretty easy to learn in comparison to Greek or Latin. I know this because I took a semester of each in high school and college, and ended up sticking with the easiest one, which was German.