Any advice for a student starting an embedded internship?

Hi. i sm a CS student in my 2nd year and I've got an internship starting in 2 weeks. I feel as if i sm behind the other interns and i don't know much to actually even start the internship. I've been learning some c++ and OOP principles as the firmware description said that those are the need to knows. I haven't got any practice with actual embedded coding however i do have an arduino uno 4 i bought recently along with some other components, breadboards, wires etc.