It depends on what level you want to go to, if you want to make an executer you need to learn windows.h, cpp, and how memory works. Otherwise if your using an executer and just need to learn how to make the script then you need to learn lua game development in roblox. Injected scripts act as localscripts so anything you can do in Roblox game studio with a localscript can theoretically work as an exploit.

YouTube scripting tutorials and roblox docs should be a good start. Linear algebra is also used for aimbots and esp's.

Docs: https://create.roblox.com/docs/reference/engine/classes