

The absolute worst airports to navigate are all in the US. Fort Worth, Atlanta, just to shame two.
Most other airports are easy to navigate, even on your first trip. It’s basically walking to a door with a number following huge signs with arrows and numbers. If you need help, you just ask staff working there. The Lufthansa people will be delighted to take a biz class passenger by the hand. Make sure your suitcase gets sent to Korea directly, pick a seat you like (aisle is better if you ask me), and don’t forget your passport. You’ll be fine!
Extinction of the human race.