- Follow proper coding naming convention.
- Keep everything inside a single git repository. But yes you can create many projects inside the repository.
- For coding tasks always use maven based project.
- Create PR for review.
- Dont commit target directory. Always commit src/ and pom.xml for java projects. Must write junit test case.
- For every section you should have a README.md file.
- Let say the section is Maven. Then you can create a READMe.md file under maven/README.md. You can do this as shown below.
- Add File > Create New File.
- In the box write: maven/README.md :
. The / after maven
creates a folder. See here: 
- Then do commit changes. Refresh the page. Then you can clone or pull changes to local. Start doing the tasks given for Maven inside maven directory you created above.