Translation of amateur in German

Our day came to an end and Samu brought us back to the hotel. We agreed to take a ride with him one more time and that was on the way to the airport. We took his cellphone number just in case.
In addition I felt were uncomfortable with a ten year old girl rowing our boat while we were sitting like stupid tourists there. I offered to row myself and took the girl's rudder. She was happy.
My sister just moved to Boston, Massachusetts and I visited her for two days only. This means that I do not know the city but what i saw of it was really nice. I will visit her next month or so.