There are lists on Github that curate libraries native to a particular programming language. For example, there is a list for Lua (https://github.com/LewisJEllis/awesome-lua) and another for Python (https://github.com/vinta/awesome-python). Explore these lists to identify areas that may require assistance. Some of these lists have not been updated for years, so it is worthwhile to conduct additional research on the domain before undertaking a project.
I have personally completed a project using this approach, although I did have some background knowledge in that domain.
This is, by far, Lua's best "feature". If you know programming you can learn 90% of Lua in 15 minutes (metatables and the C stack interface takes more time).
For a language meant to be used by non-programmers this is more than precious, it is essential.
Edit: my favourite Lua-enabled tools:
1) Hammerspoon, an automation tool for OS-X (like Windows' AutoHotkey) https://www.hammerspoon.org/
2) Openresty, Nginx turbo-charged in Lua: https://openresty.org/en/
3) Wireshark, a powerful network traffic analyzer: https://www.wireshark.org/
Many others at: https://github.com/LewisJEllis/awesome-lua
PS: on Windows I highly recommend the ZeroBrane Studio IDE. It is really fantastic.
http://tylerneylon.com/a/learn-lua/
http://phrogz.net/lua/LearningLua_FromJS.html
http://lua-users.org/wiki/TutorialDirectory