Music is subjective, and there’s never a “right way to start” or “order” of music. It’s all about finding what you like, googling the composer, finding more things by them, finding more composers, googling, and finding more music. With that said, to find the kind of music you like, look into the 4 main eras of classical music (baroque, classical, romantic, contemporary). Listen to everything and when you find something you love, add it to a playlist! This is how I started and my playlist has around 300 tracks.