Teleport BP HELP

I need help again, as I am noob in doing BPS
I found myself facing a problem doing a teleport

I tried to do it this way but it did not work because of the target.
And how can I make them work this way?
Do I need to do some interface?

So I tried the way it needs the coordinates “worked” if I teleport only one time , if I teleport more than once the game closes because it started a loop
I could do that when I entered the trigger it appeared yes or no, could also by if I pressed any button to teleport
But I want a simpler way
So I thought I just have to get the bp to check if I’ve already been teleported.
This is the problem, I do not know how to do this.
I tried to do but did not work, image of bp.
So I would be grateful if anyone could help me.