Clue #1 : in media res < a Latin locution meaning "in the middle of things". Indeed, this song starts without any intro.
Clue #2 : don't try this at university < frankly, the long pause has made me forget what this clue was really about. It might have to do with the following verse but I'm not sure at all:
"In a world of confusion
People never say what they mean
If you want a straight answer
Go look for one, right now"
It could also be about some film. I'd like to say Ghostbusters (Venkman's experiments?) but once again, it's been a long time.
Clue #3 :
< at the end of this vision, God tells Homer he has to go and make an apparition in a glass of rum, in the West Indies. (in "Homer the Heretic", season 4, episode 3)
Clue #4 : Not being narrow-minded is mandatory. < "As for me, well, I'm thinking / You gotta keep an open mind"
Clue #5 : The very first words of the song are the same as the title of an old, May-penned, Queen single < you have recognized "Now I'm Here" from Sheer Heart Attack (1974), and released as a single in 1975.