How do I make myself a custom character?

Hello!

I've been working on a game but I'm absolutely terrible at scripting, I'm currently trying to learn lua so bare with me.

Enough about that right now though,

So lets start with something that is probably super simple and right in front of my eyes. I've been trying to get my game so it so only I spawns with a certain custom character. Does anyone have a script, or know how to help me figure this out? I literally couldn't find any tutorial for this which is crazy.

Thank you!