I have been a sometimes fan of the series. I have never seen 2,3, or4 and only half of 5. 6,7, and 8 as well as Hobbs and Shaw are in my back pocket. Frankly, there is nothing to say about this except it is stupid, but I enjoyed watching the stupidity.
The substitution of Jon Cena for Dwayne Johnson allows Vin Diesel to be the focus of the film, and that's fine. There are a couple dozen secondary characters that some people seem to like but all seem to me to be replaceable at any time. OK, maybe Tyrece Gibson as the main comic relief would be a little tough to replace, but otherwise, they are cardboard cutouts being moved around the set pieces.
Most of the film is made up of one outlandish chase, race, or fistfight punctuated with some flashbacks that explain most of what is happening. Don't worry about following that, just keep your eyes on the screen for the next impossible stunt, physics defying escape or miraculous moment of self awareness. This film goes full meta, acknowledging how silly it is and even nearly saying "we are a movie".
There is no sense in analyzing any of it, or critiquing the story. this series jumped the shark years ago, it's now just a question of what the next shark is. I may be in spoiler territory here, but don't worry, it was going to come out somewhere anyway, this is the "Moonraker" of the series. They make a bunch of corny jokes, and go to space. I'm only surprised that Roger Moore did not show up with his laser equipped Space Shuttle to help out.