Dabbler
Part of speech: noun
Definition: one who dabbles
Dilettante
Part of speech: adjective
Definition: Pertaining to or like a dilettante.
Part of speech: noun
Definition: An amateur, someone who dabbles in a field out of casual interest rather than as a profession or serious interest.A person with a general but superficial interest in any art or a branch of knowledge. (Sometimes derogatory.)
Example sentence: I am regarded as a usurper, as an imposter and dilettante, because I do technically come from the wrong side of the tracks in musical terms.