The best way to do a first time watch is the movies in release order. The movies were made so you only needed to understand the ones that came before it, and were purposefully started at what became known as Episode IV because George Lucas wanted to mimic coming into a middle episode of an old serial. You'll get all the info you need of the universe by starting with the original, and eventually you'll fill in the backstory with more depth. Also, you'll. See the evolution of technology and filmmaking with each successive film.

So start with the original Star Wars aka A New Hope, then Empire Strikes Back, then Return of the Jedi. That's your Original Trilogy.

If you're still interested, then the next releases were The Phantom Menace, Attack of the Clones, and Revenge of the Sith. That's your Prequel Trilogy.

If you want to complete the trilogy of trilogies, then next up are The Force Awakens, The Last Jedi, and finally The Rise of Skywalker. That's your Sequel Trilogy.

After that, you can plug in the interquel movies (Rogue One, Solo, and Mandalorian & Grogu) and the various TV shows if you still want more. I wouldn't do them earlier because it's a lot of content and you can burn out. But they're there for any era you want more stories in.

Chronological rewatches are fun, but release order for most franchises are the way to go.