What is the best way to learn German, based on your experience? (Besides Duolingo and studying abroad there)

Only five questions! needed! 8. der a)bist alt b)sind alt c)sieht alt aus d)saht alt aus 9)die a)hat blondhaarig b)bist blondhaarig c)sind blondhaarig d)ist blondhaarig 10)die a)hat gelp b)ist gelb c)bist geld d)sind gelt 11)die alten a)ist alt b)sind interssant c)sein drumm d)seid stark 12)paula und marie a)sehen schlank aus b)sein alt c)haben schon d)ist neu

Don't delete this someone teach me german

Is krumpas the bad santa go into germany and for all the kds who dont belive in sata get a spanken from him.