I have never seen all the Star Wars films (I’ve seen some of them, can’t remember which). I recently signed up for Disney+ and plan on watching them all.
Start with 4 "A New Hope", then 5 "Empire Strikes Back", then return to 2 "Attack of the Clones" 3 "Revenge of the Sith", then continue on with 6 "Return of the Jedi", then everything else in release order. 1 "Phantom Menace" is largely considered superfluous for the story. You *can* watch it before 2 "Attack fo the Clones", but it's really not necessary, unless you're a completionist.
@kev https://time.com/4784685/star-wars-machete-order-rogue-one-force-awakens/
Start with 4 "A New Hope", then 5 "Empire Strikes Back", then return to 2 "Attack of the Clones" 3 "Revenge of the Sith", then continue on with 6 "Return of the Jedi", then everything else in release order. 1 "Phantom Menace" is largely considered superfluous for the story. You *can* watch it before 2 "Attack fo the Clones", but it's really not necessary, unless you're a completionist.