My question is about the use of commas. In the sentence below, I'm unsure whether or not there should be a comma after "office"/before "and". (note: He does not meet him at the office)
In the year 1933, David spends most of his time working at the office, and meets a guy name Frank, whom he writes a book about.
My understanding is that if two clauses can be independent on their own then a comma is necessary before the conjunction. "Meets a guy name Frank" is not independent but I'm just unsure about the whole thing so would appreciate some feedback. Thanks!