I'd like to ask experienced players: When do you think is the best time for a beginner to pick their agent?

If I pick an agent early, I worry that I might take someone else's main. I imagine experienced players might think, 'If I had picked that agent instead of this inexperienced beginner, we could have won.' That thought makes me anxious.

On the other hand, if I wait and try to pick later, the easier roles for beginners often get taken, leaving difficult roles like smoke controllers. And if I avoid those and end up picking an overlapping role, it forces someone else to switch, which must also be frustrating.

For experienced players, which situation is less stressful: having a beginner pick your main agent first, or having to switch roles later because a beginner couldn't take on a challenging role?