How do I transfer my crypto wallet to my bank account?

Could you please explain the process of transferring my crypto wallet to my bank account? I'm a bit confused about the steps involved. Could you guide me through the necessary procedures? Also, are there any fees associated with this transfer? And how long does it usually take for the funds to reflect in my bank account? Additionally, are there any security measures I should take to ensure the safety of my transaction? I appreciate your help in clarifying these points.