Hello and welcome. As a former GM user myself, my focus is to do more games for Linux, which interested me to LGM. There is no additional modules needed, expansion packs nor additional setups, just install to the OS you use and compile your game. Simple and easy.
In my opinion Enigma has the potential to beat the likes of UNITY and Gamemaker itself, two of the most common IDE for developing games, i have read people use. ENIGMA is faster, easier to setup/use, and best of all, compatible with most GM files. Of course the developers can give you a better detail on the technical aspects of the IDE.
Further development on LGM has been put on hold for the moment as it is going through a total overall of the system......as in the creation of a new IDE, aka RGM. However, you can still use LGM to produce games. You can read the Announcements section and get all the information on it.
So again, welcome and I hope you enjoy making games with LGM/ENIGMA. You can join the Discord channel to talk with the dev, ask questions and get help with any problems, you may encounter. I'm also here most of the time. Also, consider supporting by joining the Paetron page.