Speaking up in a meeting at your first job is terrifying. Good bosses remember the new hire who asked a good question.

The fear is that your question will reveal you do not belong there. In practice the room is full of people who also did not understand and said nothing, and the newest person is the only one who can ask without it costing anything. A real question also tells your boss you were paying attention, which is rarer than it sounds.

Aim for one question in the next meeting and prepare it beforehand rather than improvising. Keep it about the work rather than about you. If the moment passes, send it afterwards in two lines, which counts for nearly as much.