Capitalizing and pluralizing official titles

Offices, titles, and positions such as president, king, emperor, pope, bishop, abbot, executive director are common nouns and therefore should be in lower case when used generically: Mitterrand was the French president or There were many presidents at the meeting. They are capitalized only in the following cases:

When followed by a person's name to form a title, i.e. when they can be considered to have become part of the name: President Nixon, not president Nixon
When a title is used to refer to a specific and obvious person as a substitute for their name, e.g. the Queen, not the queen, referring to Elizabeth II
When the correct formal title is treated as a proper name (e.g. King of France; it is correct to write Louis XVI was King of France but Louis XVI was the French king)

http://en.wikipedia.org/wiki/Wikipedia:Manual_of_Style/Capital_letters#Proper_names

Shouldn't it be, "OK, genius - good luck!" Or, "OK, genius. Good luck!"

Sorry, I couldn't resist. I do value your website greatly! Am I right about the comma after OK?

While I'm at it, where the heck do I put the question mark? Should it be like this: "...good luck!"?. But wait. I need another question mark:
Should it be like this: "...good luck!"??

Ha! Punctuation is funny!

I am just starting to study at the university and I have not had such problems yet. Perhaps because we are newbies, the professor treats us condescendingly, but no one pays attention to capital letters.

Now I thought again and came to an interesting conclusion this semester, we need to pass an essay on various theories in psychology, when I looked at the essays of my fellow students, I saw that about half write with a capital letter, and half do not, and the professor does not make any comments . Maybe it depends on your school. At first I did not pay attention to this, because I was very busy and I did not have time to prepare an essay in a quality manner, I used the services of https://essayreviewexpert.com/review/essaypro/ and then just handed it over to my professor. Later, when we had a discussion at the lecture about the quality of our work, I drew attention to this. Perhaps you have a strict professor and this matters more, or you just want to study this issue well)