hey don't care what they sky or background look like as long as the subject is exposed properly. Which by properly I mean overexposed, in most of their cases
So you're letting someone dictate your vision? The original I downloaded showed a decent histogram, but your first edit showed everything pushed off the right. Don't let anyone force you into downgrading your image so you can imitate someone.
As to the image, "High Key" is a style or genre just like "Low Key", and is a decision that is made before the shutter clicks. Not all subjects/scenes lend themselves to a particular style, so you as the photographer need to know what works where and when, rather than trying to force your image to conform to a style after the fact. Read/study what others have to say about the style there's a ton of information out there on the internet that can help you, then think how you want to apply that to an actual shot. Plan the shot before you click the shutter. That's what VS was trying to tell you above. Learn to see everything in the scene, move around, look it over, think about it.
"High Key" is a style of lighting that results in an exposure with little to no shadow based on the amount of light received or a 1:1 ratio of light. It does not mean overexposed! Anytime you push your exposure off the right you loose data in the file. By it's very nature, "High Key" results in very low contrast and soft transitions in the shadows, but a properly exposed "High Key" will have a true RGB white of 255 and a true black of 000. One of my pet peeves are lazy photographers who blow the whites intentionally, overexposed images won't show a true black. Sometimes despite your best efforts it isn't possible, and then it becomes a matter of which is the lesser of two evils. It's not as easy as it looks, maybe a case of do as I say, not as do. Here's one close, but not quite.
View attachment 169449
Both "High Key" and "Low Key" requires a careful consideration of the clothing worn by the subject. If you're shooting for light and airy, why would you want your subject in darker colors, instead of lighter colors, it's self defeating. The same holds true for the background, stay away from the dark trees and shadows.