VI/VIM question

[Mike Hoy]

I'm not used to working with either of these programs, but the same
problem occurs in both. I use vim in windows and vi in linux. I
generally understand the escape mode and the interactive mode. And I
can save and quit programs. But I'm having trouble with the cursor.
Say I have the following lines:

Testing, testing, testing.

And I go back to the beginning of the line, make a change to it and
come back to the end of the line. The cursor is then stuck on the
period after testing, or whatever the last character is. How do I move
past that last character, tried arrow keys, but they don't seem to
work.

-- 
Mike Hoy
Saguaro Sports