When learning CAD commands, we should always combine practical application, and don't spend our main energy on learning each command in isolation; The principle of applying what you have learned runs through the whole learning process, which makes you have a profound and vivid understanding of drawing commands and is conducive to cultivating your ability to complete drawing independently by using CAD.
Shortcut settings:
Move the mouse to the toolbar and click Tools → Customize → Interface, and a "Customize User Interface" will pop up.
Click the+sign in front of "Keyboard Shortcut", then move down, click the triangle to the right of all commands, then select the custom command, and then press and hold the command you need with the left mouse button.
Move to the keyboard shortcut, enter the keyboard shortcut, click the command just selected, and there will be a key on the right. Click "..." to open a small window on the right of the key, for example, press "Ctrl+W" and then click OK → Apply → Exit.