The Fabelmans is a great movie. While Sam Fabelman is the main character, this is still an autobiographical story of Spielberg's childhood, his family, discovering movies, and his growth in making films. Spielberg wrote, produced, and directed the film, and it is a masterpiece of direction, sound design, and editing. While I'm not a huge Michelle Williams fan, she was amazing as Sam/Steven's mom, giving an amazing performance in a very physically and emotionally wrought role. Plus she shows off her real piano playing skills.
John Williams did the music, so the sound design and editing of the music with the scenes in the movie, and in Sam's films is beautifully done.
Well worth the watch just as a movie, but all the more for anyone who is a fan of Steven Spielberg's and would appreciate how he came to love making movies.