I downloaded VTSCADA light to create a usecase demo for about 50 tags in one shed. However, after downloading the application and on opening it - I am unable to see any options for accessing the Application Manager.

1. How do I access the application manager in VTSCADA Light?

2. Are there specific tutorials/documentation to navigate the Light version?

When you start the VTScada application, the application manager is the smaller window which first starts:
https://www.vtscada.com/help/Content/D_Tools/Dev_VAMOverview.htm

If you are not seeing this, it is likely that you installed VTScada as a service. I'd suggest re-running the installer and ensuring that you do no select to install VTScada as a Windows service.

If you do wish to run VTScada as a service in Windows, it is something you can do but will need to turn of AFTER you have done some initial configuration. The button to install it that way in the installer is really for folks looking to upgrade an existing installation which is already configured to run as a service.

https://www.vtscada.com/help/Content/D_Customize/Dev_VTScadaService.htm