As far as I know it’s not so easy to play an animation blueprint with matinee (I think it’s not possible), but in matinee you can use your animations -> just add your skeletal mesh into the level (not the enemy blueprint) - create a new skeletal mesh group - right click on it and add a anim track - set a keyframe and choose your animation. Now when you play the matinee, it will also play the animation.
But depending on how you want to the character to act like, you could also do it like that: 