How can I change the menu icon on Raspberry Pi 4 Model B?

I’m attempting to customize my Raspberry Pi 4 Model B and would like to start by changing the menu icon. I have tried using Chat GPT to generate commands, but when I ran the commands it provided, I encountered multiple errors in the terminal.

Could someone please guide me on the correct procedure to change the menu icon on a Raspberry Pi 4 Model B? I would appreciate any specific commands or configuration steps that I need to follow.

Additionally, if there are any troubleshooting tips or common errors to watch out for, please let me know. Thank you!