It will come grasshopper. Use the front sight. Be aware of the rear sights. Smooth is fast, fast is good.
I would suggest practicing on paper pie plates at 21 feet, chest high, and about 3' feet apart. The pie plates will not allow you to "index on the ding".
Start out by hittng all the plates every time. Speed does not each technique. If you have got the trigger control, you need not take time to get "a fine bead". This drill will perfect your trigger control, cocking the revolver (what do you do with your thumb?), and show that this method will produce a hit a little high. I take a 6:00 hold and into the "meat" a few inches.
I came to cowboy from IPSC. I have the classic IPSC draw. Bring the revolver up in front of you meeting the revolver with the wek hand, cocking th revolver as it is extended/presented to the target, and, at the same time, picking up the front site s I present the handgun. I holster in reverse. Unless you have a radical rake, this will facilitte hitting the hole. (I am a little nutty on the holster).
Dryfire is your biggest friend. Every top shooter got there by dry firing a bunch. I used to spend a quite a bit of time wearing my holsters and guns round the house and practicing on pictures and stuff. Kids are gone and a great wife.
Remember this. Practice does not make perfect. Perfect practice makes perfect.