About that roll cast, you can't roll cast on a lawn very well. In fact it is darn near impossible to do it well so don't frustrate yourself trying to learn it by practicing on grass. The drag of the water on the line is what lets you roll it. Other types of casting can be done well on the lawn. Remember that when you are false casting back and forth that what the line is doing in front of you should look like what it does behind you, so look behind you to see if your front and back casts are symmetrical.

Layton Runkle