Professor Kupinsky put together some great travel resources last year. They can be found here:
https://romewinter.wordpress.com/category/travel-resources/. I strongly encourage you to read this page. There are tips on safety, getting around, finding places to eat, and more.
Also, on this site are some of the blog posts written by students who took the course last year.
Additionally, here is a great blog post about staying safe in Rome: https://anamericaninrome.com/wp/2016/08/how-to-stay-safe-in-rome/
This post has great info on finding an address in Rome.