Re: New caster problems
Here's a tip that I was given when I started fly fishing many moons ago...
On both the forward cast, and the back cast, pretent you are holding a cup of water...when you begin your forward cast, accelerate to an abrupt stop, making the water "fling" out of the cup. Same applies to the back cast.
Don't worry so much about breaking your wrist and keeping your arm and wrist in one straight line...I have been told that is the old way of thinking (although it is still taught that way be many people)
It takes practice...You'll figure it out!