How do I make an encounter in a 2D Sidescroller?

Hello, i’m currently new to the engine and I need some help with how to set up some blueprints. The basic idea is that i want to make it so when the the player character gets into a certain range of the Enemy AI to stop all movement input from the player character and make it so a new HUD shows up with “buttons” that the player can click to issue some commands. I have tried looking up tutorials but I can’t seem to be able to find some. Any advice and solutions would be helpful and very appreciated. Thank you very much in advance. :slight_smile: