Hello nanana35, There are different manners to express it in a better way such as: "The report, that I am going to introduce you,includes the different themes I approached earlier during the course."

I would rephrase it, for example "The report I'm going to introduce will discuss the different themes I familiarized with during the course."

revolve around - unknown phrase for me... Does it mean "include"?

I think you can remove word "that". It is unnecessary here.