There are a lot of ways to measure your progress as a student. Something I think is very important is to have a few goals set as to what you really want to do as a musician.
Everyone starts out as a beginner and most usually progress to the intermediate level fairly soon. Here are some thoughts on different levels.
They might lead to answering silly questions like, “Who’s a better guitar player, George Harrison, Neil Young, Jimi Hendrix, Van Halen, Bob Dylan, Julian Bream...”