Find a new piece of music. This can be for any instrument. Your local library is a good place to look. Open the music to a random page.You now have to describe every single element on that page.
You will need to identify dynamics, clefs, key signatures, italien terms, instruments and anything else that appears on that page. If there is any item on the page that you do not understand you must go and look it up and make sure you are clear on the meaning.
If you are easily able to complete the task above then carry the analysis a stage further and describe the melody, instrumentation or, for the more advanced, do a harmonic analysis.