Input on Begin Play

Hello all,
I created a bp door using a timeline, wich is trigered by the E keyboard touch.
I duplicated this bp in my scene so I have 3 bp doors: A, B and C.
By default, in the bp graph, the door is closed at the Begin Play.
What I’d would like to achieve is to set door A to be open at the begining. I’m not a programmer and I encounters some difficulties to do it.
Should I insert a node in the bp door, or recover a value from this bp inside the level bp to say "at the begining, the door A is open, while the 2 others are quite closed, and if I click on the A door, I close it. If I click on the B and C door, I open them.

I hope to be clear, and sorry for my english…