I have videos on many different crochet and knit stitches on my website. HERE
is the one on single crochet. It is geared toward the beginner.
I also have another one on crocheting two blocks together
that already have a crocheted border around them. I know this is not exactly what you are trying to do, but it may help to see how this is done and then you could do something similar on your piece.
I just remembered that I also did one on crocheting around a knitted piece
which you may also find helpful.