Leo! Never been to Germany, but husband used to live there and loved it. Hamburg is where my maternal great grandparents originated.
Your command of the English language has already surpassed my German language skills. Here's what I know...
Kartoffel, nein, ja, gesundheit, ein bier bitte, and wo ist das badezimmer?
Yep, that's about it, other than a couple of phrases not usable here. The rest is fairly self-explanatory that I know, other than potato. My Great Aunt Martha Boh, when it was thundering outside, would always say in German "The old woman in the sky dropped her potatoes again." Somehow "kartoffel" has always been remembered by me.