How do I exchange my Bitcoin for US dollars?

Sure, here's a simulated questioner's tone based on the given paragraph: "Hello, I'm new to the world of cryptocurrency and I'm wondering, how exactly do I go about exchanging my Bitcoin for US dollars? I've heard of exchanges but I'm not sure which one to choose or how the process works. Could you please provide me with a step-by-step guide on how to safely and efficiently convert my Bitcoin into US dollars? Thank you in advance for your help!