You will need to learn how to use git. Git Tuturials is a nice place to begin. Install and configure git for your operating system. If you prefer a graphical tool, SourceTree is a good tool while most of the IDEs have a VCS plugin that will give you graphical experince with Git.
All muzima mUzima projects are built, compiled and packaged using Maven except mUzima android that uses gradle. You will have to install and configure maven v3.0.5 (there are known issues with later versions) for your operating system - instructions can be found here.
mUzima android project is built, compiled, packaged and tested using gradle. You need to install and configure gradle v4.4 for your respective operating system using installation instruction found here.
Install your preferred IDE (Integrated Development Environment)