How do I transfer money from Bitcoin to my account?

Excuse me, I'm a bit confused about the process of transferring funds from my Bitcoin holdings into my regular bank account. Could you please explain the steps in a clear and concise manner? I'm looking to understand the best practices for doing so, ensuring both security and efficiency in the transaction. Additionally, would there be any fees involved in this process, and if so, how are they calculated? I'd appreciate any insights you could offer to help me navigate this process smoothly.