A RPG Maker-style Textbox dialog system? [closed]

Okay, I've tried making Dialog textboxes, and what I mean by that is textboxes that appear when a NPC or something is clicked, now unlike the Dialog system roblox provides, I want it to be kinda like what you see in Blamo or Super Paper Roblox. Essentially a custom Dialog system using ScreenGUI. But how? I've tried making a GUI template appear and having text change, but to no avail. And I can't find ANY tutorials and whatnot online. I would appreciate some help here.

I've already tried making a starterGUI visible OnClick, and a GUI cloning itself from lighting to StarterGUI. I'm not a big scripter, so this is kinda out of my reach. That's why I want some help.

Sorry about all the extra info and whatnot