1) Amateur 2) Dabbler 3) Dilettante 1) Dabbler 
• (n.) One who knows many things superficially; a pretender to science; a smatterer.
Sci'o·list noun [ Latin sciolus . See Sciolous .] One who knows many things superficially; a pretender to science; a smatterer. « These passages in that book were enough to humble the presumption of our modern sciolists , if their pride were not as great as their ignorance.&#...