Kelly Gallop gives a pretty good fly casting presentation on You Tube.
Don't get to caught up about not catching a few fish as you begin to learn how to fly cast including what and how many flies to buy.
Join a local flyfishing club like Trout Unlimited if you have one nearby. They are always looking for new members to join.
If you have a little extra money you could hire a flyfishing guide for a day and explain to him what you would like to learn.
Hope this helps and remember practice and practice some more.
