Connie K

I'd say around 10-15 is an alright amount of words. Memrise is a great way to build your vocabulary, really. Here are the top 5000 Geman words sorted alphabetically and here are the top 5000 German words sorted by frequency. Use whatever you think is better. The alphabetical one points out the weak verbs and in the one sorted by frequency you can hear how the words are said. Both are great stuff.