As long as you can read English, you can navigate almost any airport. Almost all airports have English on their navigation signs.

You will likely be interviewed both in Europe and in South Korea when you fly. This is routine for all passengers. You should have your return ticket information, otherwise you are going to get flagged as a human trafficking risk.

Download the airline’s app before flying; it will help get updates from the airline and will update your ticket if there is a change in gate.

Bring an external battery for your phone with you to keep your phone charged. Also, have an idea how you are going to have phone data in Korea; airport WiFi may be spotty.