Help needed in installation

Someone who has installed MIT App Inventor recently please guide which installation steps are more appropriate to be followed

  1. GitHub - mit-cml/appinventor-sources: MIT App Inventor Public Open Source
  2. How to build App Inventor from the MIT sources

The README version is the definitive version, specifically the section on manual setup of the build environment. There is a link there to a slideshow that includes step by step commands if you need a further breakdown.