Importing files from AutoCAD

Hello, I am brand new to using sketchup, I am using the free version. I have an assignment where I need to import a section from AutoCAD into sketchup, but I do now have a file - import option. Is it possible to do this using the free version? The only option it gives is to ‘insert’, then when I find my file, it says ‘unsupported file’. I have tried in Jpeg, Dwg, and PDF.
I am located in Australia and only need the program for one uni assignment, so do not want to pay to use it.
Thanks
Meg

If ‘brand new’ , start a trial period of 30 days and see if it fits your need.
https://www.sketchup.com/try-sketchup