An admirer or lover of the fine arts; popularly, an amateur; especially, one who follows an art or a branch of knowledge, desultorily, or for amusement only
disapproval You can use dilettante to talk about someone who seems interested in a subject, especially in art, but who does not really know very much about it. someone who is not serious about what they are doing or does not study a subject thoroughly (present participle of dilettare , from delectare; DELIGHT)