http://prntscr.com/c92r3q
if you're new to lua though, what you really need is a lua tutorial, not a lunalua tutorial.
snoruntpyro's videos will show you how you can use lua to interact with SMBX, but it won't really teach you how to code in lua.
If you've ever programmed before, it's easy since lua is probably one of the simplest languages, so all your skills would be transferable.
If you've never written code before, go look for a lua tutorial, there's a lot of them such as this one
https://www.lua.org/pil/1.html