Take a look at this tutorials: ? It will answer all your questions 
Or do it like that:
- in the “my character bp” you have to add a bool variable which will be activated/deactivated by a input
- in the animbp you have to cast to your character - then create another variable in the anim bp - get the variable from the “my character bp” and connect it with the set node from the bool variable in the animbp
- go into the anim graph and set it up like on the picture -> so in the state you have to add the animation - the link to the state should just have the variable - the link to the idle state needs a variable + not
