Getting to Berlin is very straightforward. Berlin has two commercial international airports. Tegel Airport (TXL) is situated within the city limits. Schönefeld Airport (SXF) is located just outside Berlin's south-eastern border in the state of Brandenburg. Berlin also has excellent rail service from most major European cities and of course, the German federal highway system, the infamous Autobahn, provides [high-speed] access to Berlin.
Once in Berlin, taxis are ubiquitous and you can find an Uber driver with the click of a button on your smartphone. Mass transit in Berlin includes bus, tram, and light rail. All are fairly easy to use with many English subtitles and English directions.