Hi I am also new to Playmaker, but what I would do is,
1-Add a new event where it can check if it can raise, add your array to this one, and if it check that it should not raise it will just go back to the crouching event.
2-In theory you would have a check event that will just control if it should ether stand or stay the same when you release CTRL button.
Please tell me if this makes sense.
I hope this helps, Nice thing about code is there are so many different ways to do the same thing.