Tyro is noun that refers to a beginner or novice.

Tyro comes from the Latin tiro (T-I-R-O), which means "young soldier," "new recruit," or more generally, "novice."  The word has a long history of being used attributively—that is, directly before another noun—in phrases like "tyro reporter" and "tyro actors."

My nephew plays the drums well and has even started a band with some of his friends.  Even though he is a good musician and has been practicing regularly, at 14 he's still a tyro and has a lot to learn