Robot Companion AI

Hi guys I’m pretty new to UE4 and I’m currently making a level where I have a robot companion follow me around an art gallery but it;s also supposed to tell you information about the gallery. The problem is I have never touched AI so I don’t where i would need to start in order to do this. Any tips and help on how to make the robot follow you and speak to you when you interact with gallery piece. Thanks in advance