How to send bitcoin from one wallet to another?

Hello there, I'm curious about the process of transferring Bitcoin from one wallet to another. Could you guide me through the steps involved in this process? I'd like to know if there are any precautions I should take to ensure the transaction is secure and successful. Additionally, I'm wondering if there are any fees associated with sending Bitcoin, and if so, how they are calculated. Finally, I'd appreciate it if you could explain the concept of a wallet address and how it's used in the transfer process. Thank you in advance for your help!