Making a 2D NPC that talks using text

I’ve looked for other tutorials on this sort of thing but I haven’t been able to find any, I’m making an NPC (which right now is just a white box as a placeholder) that upon entering a triggered zone (using a circle collider here) and pressing a button will cause said character to talk through some form of a chat box or speech bubble. I’m not sure if this is really simple and I’m just an idiot or if this is way too complicated for me to even try at my current understanding of script coding. Thanks though!! (hope I don’t sound too dumb)

I find it very hard to believe that you didn’t find any of the top 50 or so results on youtube when you type in “Unity dialogue tutorial”. Here is an example of extremely primitive functionality explained: Unity Basics - How To Create a Dialog Box & Import Text - Part 1 - YouTube