Firstly start by creating a new project by clicking on Add Project, Create your own project.
Your new project will appear in My Projects. You can rename this by clicking on the 3 vertical dots and selecting Rename.
Choose your name and select Rename Project.
Make sure your project is selected, then select Add Feature. Search for Path or Public right of way.
Once selected you can start to draw on the map. Single left click to start, double left click to finish then click on Finish drawing.
If you wish to add any annotation or arrows you can do so using the Annotate tool.