That’s not surprising, I started around that age and I wouldn’t have been able to wrap my head around Unity or Unreal at that time, had they been around. Have you tried any simpler stuff like Scratch, Game Maker, or GDevelop?
Some folks will gatekeep over not diving into more programming-heavy engines, but I think there’s merit in taking time to get your feet wet in a simpler environment so that you can build the fundamentals that will carry you in the future.