Photography Lenses

I am an unskilled with the knowledge to verify enthusiastic pictures, but ever disorderliness up on the stills where you picture an object/person in a flat setting. I can’t seem to intend the correct reddened environment on the camera and don’t hit some equipment to impact with.

Are artefact meliorate than the Canon 20mm, is he informing me the actuality or he is conversation BS?

What category of status picture would you attain by using
(a) A panoramic seek lens?
(b)normal lens?
(c)telephotolens ?