How can i add a lock-on feature for third person character?

Hi, basically like in third person fighting games, i was wondering how i could on comand make the camera focus on a specific blueprint class (the enemy). I will also with this eventually want to be able to switch between who is locked on, even though they all come from the same blueprint class. Im keeping this simple because still new to unreal and once i know about the camera more, it would help me add more in my own terms. Thanks