I would have thought the "jumping on point" for any
Bond movie is buying a ticket.
I agree with that.
I mean, what does the movie-goer need to know about Bond? Let me list the knowledge required to enjoy a Bond film:
1. He is a British secret agent.
2. That's about it.
Sure, there is a bigger Bond mythology if anyone really cares to delve deeply into it, but it certainly isn't required to understand/enjoy a Bond film.