How to use commands with a windows keyboard
keybindings - Command and Option keys on Windows keyboard - Ask Different
Does any know where the command button is on this keyboard (sorry for sideways photo and camera quality)
Run Command Keyboard Shortcut With No Windows Logo Key
I recently got a keyboard with windows keys but when I go to use commands such as copy and paste, the windows key wonโt work as the command one. Any help is appreciated!
The Windows key will operate as the Command key, so cmd-c is win-c.
Further, the Alt key will operate as the Option key.
In macOS the copy command is invoked by the key combo command + C. The Windows key is normally the command key. As your keyboard does not have a command key you can map that key behavior to another key.
To swap the behavior of keys, go to System Preferences --> Keyboard --> Modifier Keys, select the right keyboard and set the desired behavior per key.
An option would be to set your alt \ option key to act like command and have your Caps Lock act like alt \ option.

Alternatively you can use Karabiner-Elements to set more advanced key remaps.