There are reasonably good keyboard versions of the Canon in D.
Youtube provides an extension selection of videos that you can use to learn how to play Canon in D major on the piano. Sheet music can also be found on websites like MakingMusicFun.
If you can play it, you are old enough to be a musician
The musician played the piano beautifully at the concert.
That is possible, but highly unlikely.
This is, in music theory, a "theoretical" - and rather goofy - question (I am a graduate musician). Enharmonically, "F flat major" is E major - they are the same enharmonic key - and E major is much easier to read and play.
Traditionally, a drum major does not play the drums. It is just the title. However, it is possible that a Drum Major would play the drums, though.
all the above play a role
To be a musician, you have to know how to play an instrument. You also have to know the correct notes and LOVE to play. You don't have to go to college, but I would recommend it.
how many total measures would a musician play in the following example.
A trumpist. I know because I play the trumpet...:)
horse
Canon Rock