DILETTANTE

one with an amateurish or superficial interest in the arts or a branch of knowledge

/an amateur who engages in an activity without serious intentions and who pretends to have knowledge;

showing frivolous or superficial interest

"She had had an eye on the dilletante who had annoyingly made a point to critique every work in the room."

"He knew he was perceived as just a small dilletante amongst them, but his interest was genuine and his knowledge superior."

"She didnt like going to the movies when Jenny was with the group because she was so easily exposed as a dilletante that it made the rest of the film club embarrased for her."

"Having only really been a sort of dilletante she was nervous about having to give a speech on the subject."