Create configuration tool/ service that create XML files based on external link information

I have to create configuration tool/ service that create XML files based on external link information. The XML files are created using an XML schema format.

• The service must be able to tell a front-end in a simple way which fields and values ​​are possible.

• If the fields (schema) Of the XML changes, this should automatically result in a modified front-end.

This is my first professional Laravel project, i am very new with programming to. I really don't know where to start. i have done some basic projects. Can someone help me out? I need to know where to start and the best tool to use.