How to press a key such as 'e' to pick up an npc?

I am trying to make a game where you save people from disasters, fire, floods etc. I want the player to be able to pickup an npc and I have absolutely no idea where to start. I know it's a lot to ask from some people just trying to help, but can someone help me in a way that doesn't just give me the complete code. i'm a newbie trying to learn. Thanks

Check out https://developer.roblox.com/en-us/api-reference/class/UserInputService It has some neat examples of how to handle user input.