in emacs you can use the pull down menus at the top of the
screen to do what you want - or these keyboard shortcuts
shortcuts are shown in the menus if you want to learn more of these
C = the control key
M = the alt key
C-x C-s to save a file
hold down ctrl press X then S
C-x C-w to save as
C-x C-f to load a file
C-x C-c to quit
to copy a block of text: go to the begining of it (with the cursor) press
C-space then go to the end and press M-w
to cut a block of text: do the same as copy but use C-w insted of M-w
C-y to paste
C-k to cut the text from the cursor position to the end of the line
C-_ to undo
hold ctrl and shift and press - (the key next to 0)
C-g to cancel a command (ie if you're at the load file prompt from C-x C-f
and you decide you don't want to load a file after all then press C-g)