Willie's advice is correct for 14.1 and also snooker games where the creation of angles isn't necessary 99% of the time since you have multiple balls you can play position for.
But if you plan on reaching above a B level in the rotation games, you need to learn English as much as you do centerball/vertical axis, because you'll often find yourself in situations where the natural angle is blocked.
The Filipinos are raised on full rack rotation, which requires a mastery of English (especially inside English) and they've been the most dominant force in the rotation games for the last 2 or 3 decades. They also play in humid conditions, and I can tell you from playing in a San Bernardino, CA garage for the past 25 years, that running English is pretty much required for a lot of shots, since vertical axis shots tend to stick and lose speed very quickly. So it's either: Increase power on the shot, which compromises accuracy and control, or use some English and keep power on the shot below medium.
But like others have said, you should look to use the vertical axis before you use English, and basing your game around the vertical axis is easier than ever before with the advent of Simonis and better rails, but all the greats can shoot with English as accurately as they can using the vertical axis.