Using an apple mac

I was a PC user beforeI started this project and during the course of the project I begun to use a mac and certain things were different with a mac there is no right click and therefore those feautures like copy and paste etc. To do that on a mac  to copy I would have to click cmd c and to paste I would have to click cmd v.
On the Mac however if you are using photoshop you cant use the comands either to copy and paste. you would have to duplicate the layer and then do what you want to do.
 So to know how to do certain things I would be able to on PC but couldn't do the same way on the Mac I looked for tutorials on youtube here ae two of those I looked at which I found helpful.

http://www.youtube.com/watch?v=208OjbKKsIg&feature=related