We've listed the MCU shows order below, too, so you can see how they fit around the movies. This is how you'll want to watch the Marvel movies in order if you're a continuity buff – it lets you enjoy the sequence of events as they happened. Let's start with a Marvel Cinematic Universe (MCU) timeline, now including 2021's Black Widow and Shang-Chi and the Legend of the Ten Rings! This explains how to watch the 25 Marvel movies in chronological order, starting with Captain America's origin in WWII, and ending with the introduction of Simu Liu as Shang-Chi in the newest Marvel movie.
The Avengers was the movie that made us all believe in the MCU vision, and things have only gotten bigger and better since then.