Variable in a Character BP with animation

Hi!

I have a character with some animations, one of them is swimming, I want that my character swims so I put a variable (Booleans) on the Game Instance and I call the game instance to my Level bp but I can’t make Set variable. (1st image)

The reason why I put the variable on the Game Instance is because if I put it inside the Level BP I can’t reference, or I don’t know how can I reference…then I must use the variable inside my animation character (2nd image)

Thanks!