How do I change the color of the UI?
Color is set in the PlayerStats material parameter collection MaterialParameterCollection'/Game/PlayerStatsKit/Materials/Global/PlayerStats.PlayerStats'
How do I change player name, I changed it in the stats component but it does not change?
Player name is saved to the save file, try deleting your saved file after changing the default value in the stats component.
How do I set Skill rating or Experience?
Skill rating and experience is a very specific game feature, we didn’t add implementation for that, but once you add or connect your own skill rating/experience functionality you can easily plug it into our assets.