Keyboard shortcuts can make it easier to interact with your computer, saving you time and effort. It can be an accessibility feature for those who find it difficult to use a mouse. Keyboard shortcuts consist of a combination of two or more keys that, when pressed, can be used to perform a task that would typically require a mouse or other pointing device. For example, well know shortcuts, Ctrl + C to copy and Ctrl + V to paste.
If you have difficulty with pressing a key combination together, you can turn on Sticky Keys by pressing Shift key five times.
Also, most programs provide accelerator keys that can make it easier to work with menus and other commands. Check the menus of programs for accelerator keys by pressing the Alt key within the program.
Here is a useful page from Microsoft around keyboard shortcuts. They have arranged shortcuts in useful categories.
If you want to go further with shortcuts, you could have a look at AutoHotkey. It a quite a nice program that allows you to make any keyboard key be used to launch programs, open documents, send keystrokes and mouse clicks and movements. It’s a utility program that runs in the background, which you can turn on and off.