If you would like to understand and speak Dutch, read this article and defenitely notice the Dutch courses offered by the Ghent University.
Another way to practice Dutch is with apps on your phone: DuoLingo, Memrise, Dutch BB…
You will learn basic things such as numbers, which is practical if you need to order more than one beer!
You can also listen to the radio, try to read comics and newspapers (maybe your horoscope will sound better in Dutch?).