I used to work some years ago with an executive secretary that was a whizz at keyboard shortcuts on a PC. When her new Macintosh was set up at her work station and had to use a mouse, she was really disinchanted with the mouse. Took her about six months to really use the mouse and to learn all the short-cut keys for the Mac. She loved the Mac with all the short-cut keys she found.
Today it is the same way, there are short-cut keys to open and to do just about everything. Learning curve I am sure for you, yet you will get used to it and be better off for it.
You were smart enough to learn Windoze keys and you will learn the Mac keys also.
How do you like the Doc in Mac X?
Have you figured out how to open up recent applications under the Apple menu? Same as a short-cut key in-time with the mouse.
Go to the Apple menu/to recent items/to your latest applications that you had been running before, and you will be in that application as quick as you can sayQUICK KEYS! You would have had to open other applications before the application showed up on your recent items menu. Applies to recently opened documents also.
Hope this is a new hot key for you!
Trying to help.