You are doing gr8, finally a podcast which gives actually commands intro to s/w. Keep going it helps for newbie BSD users like me ..

a very simple introduction I wrote back in '91 can be found at: http://xyz.com/~michael/vi.txt
This should be enough to get you doing basic edits, I deliberately leave out macros, ex mode and so on.

Even after all these years still going as strong as ever. Actually as text editors go, vi is simple yet powerful.