Should I use Lua?

Should I use Lua?

I am going to work on my new project where client has demanded to use
'Lua' if possible, I have never used it before and by searching on it I
found it is fast compare to javascript and getting popular nowadays.
As I am very confused I had never use it before so I want to know something
Is it really better(in terms of performance and use) then javascript?
Will I get enough resources(because I don't want to move over after
starting development due to lack of resources or it becomes hard to me
develop)?
Will it needed anything other than C compiler to run?
Please guys it is really important to know about such thing before
starting. Any help will be appreciated.