Feeling like a fraud usually means you’re in a room that’s stretching you. Stay.

That particular discomfort shows up when the level around you is slightly above where you have been, which is also the only condition under which people improve. If you felt entirely qualified, the room would not be teaching you anything. The feeling is a sign of position, not of fakery, and it tends to fade about the time the room stops being useful.

Instead of trying to look like you belong, be the person who asks the question everyone else is avoiding. Write down the words you did not understand and look them up afterwards.