This is what I have of my string quartet so far. I am using Musescore for composing this, so I put in 100 measures because I didn't know how long the first movement of the string quartet would be. If there are no dynamics in the piece, Musescore defaults to playing it mezzo-forte. I exported it as an image and then added the arrows and text to it.
I don't know if I have the cello going too fast with the Alberti bass in the tutti and the eighth notes in the solo. I have my Allegro at 120 BPM. I have been binge-listening to Mozart's string quartets and you can probably see that I am doing a Neo-Mozart, if you will, with this string quartet.
But is what I have a reasonable start to a string quartet? And importantly, is the cello going too fast there with the Alberti bass and the eighths?