So...I wanna learn Lua. Any tips to how I can?

Yeah. No idea where to start.

[GOAL: Learn Lua. So, I can make a customization screen thingy)

Just a simple builder looking to become a scripter too.

Whenever you get stuck, need to know what something is, just go to the roblox wiki, search the 'function' you need and there are explanations and even sometimes tutorials of youtube and custom roblox scripts!

[EDIT] Screen GUIs can be tricky for some people, try simple stuff before GUIs!

I learned most of my early LUA from peaspod's lua tutorials on youtube. Go find his youtube channel on his roblox profile.