Unless you have a rather low-level terminal (like the kind you get from a telnet or WebTerm session) you should be able to use your mouse with emacs. Without a mouse, half the fun is gone. If your mouse is not effective, or if you care not to use it, here is a summary of movement commands available in emacs (recall that C-character means Control+character keys and that M-character means Meta+character keys simultaneously)
C-f Move forward a character
C-b Move backward a character
M-f Move forward a word
M-b Move backward a word
C-n Move to the next line
C-p Move to previous line
C-a Move to beginning of line
C-e Move to end of line
M-a Move back to beginning of sentence
M-e Move forward to end of sentence
M-v Page up
C-v Page down
M-< Go to beginning of file
M-> Go to end of file
Move around a little in your sample file to get a feel for these commands.
Now let's say that you want to move down 20 lines, but do not feel like typing in C-n 20 times. The C-u sequence allows you to repeat any command, any desired number of times, in this case,
> C-u 20 C-n
You should see the cursor move down 20 lines. Note that C-u can be used with any command in emacs.
Now that we have movement out of the way, let's go to Editing with emacs.