Want to watch Star Wars and don’t know where to start? See Rogue One first then episode IV.
I know it sounds weird to see episode IV before I through III but all these movies were made and released in a weird order and there are spoilers in the “prequel trilogy” (I–III) for the earlier “original trilogy” (IV–VI).
Episode IV wasn’t called episode IV when it first came out in 1977. It was just called Star Wars. When the next movie was made in 1980, that’s when they added the episode numbers. Making it in the style of an old Flash Gordon serial. Even though Star Wars now is older than Flash Gordon was then.
Over twenty years they made episodes I, II, and III and they only make sense as backstory movies for people who already love the original movies. The whole conceit of “this is really the first episode, the starting point”, that idea was not executed well.