I've already installed TeXLive and TexMaker. Now I'm thinking of turning to LuaTeX. What are the steps I have to follow in order to start compiling with LuaTeX? Do I have to install Lua first? If so, which is the best way to do it on Windows 10? Out of the many github repositories dedicated to this purpose (e.g. rjpcomputing/luaforwindows or luarocks/luarocks/wiki/installation-instructions-for-windows) which one is the most reliable?
You do not have to install Lua separately in order to run
luatex. If you have installed TeX Live (the usual install is the full install) you will have it on your machine. If you want to double-check use
texlua --version in the command line of your operating system.