With the number of posts you've got - I'd say that you have a pretty good idea of the sport.
There are videos available, of course - as well as several books - among them are:
'Fast and Fancy Revolver Shooting' - by Ed McGivern - a classic - but not devoted to C&WAS.
'Action Shooting: Cowboy Style: an in Depth Look' - by Taffin
'What would Wyatt say? Wimp loads, close targets and high-tec mods: what's happening to cowboy shooting?' - Mike Venturino, 'American Handgunner' magazine.
Go to
www.bibliofind.com - type in 'cowboy shooting' - and take your pick.
You can read the books and watch the many, many videos available from enterpreneurs across the 'virtual prairie' - but absolutely nothing prepares you as well as actual shooting - followed by more shooting.
And dry-fire practice.
(with any and all loaded ammunition in a different room - just in case...)
The design of the Colt Single Action Army is a very natural design, ergonomically - and it lends itself well to this sport.
The needed hand and eye coordination is something 'you' need to develop on your own - and that's done by investing the time in practice, practice, practice...
Good Luck.
Scouts Out!