Dan and Steve,both of you speak the truth. Your knowledge of anything consists of summaries of your experiences. It is not possible to "make something unlike anything you have ever seen". However,that was the stupid assignment some William and Mary art teacher would give students. Anything you imagine has elements of things you have seen.
The trick,I think,is for a "beginner" to know the GOOD things from the bad. Museums may not always have the best designed pieces in them. But,for the most part,they are a better bet than looking just anywhere.
I do not consider some of the most famous painters to have done what I'd consider great work. Nor some of the most famous current furniture designers. I met some of them when I was teaching at Penland Craft School. Some were real jerks.
Sort of along the lines of what Dan said,some artists get lucky,sell a piece to some well known person,and gets 'in".
One of these famous furniture makers made the most uncomfortable furniture you have ever seen. He made "roots" that would come out of a wall,curve down sort of in a lounge chair curve,and go into the floor. The root might be 8" wide,and was just impossible to get comfortable on.
One time,I saw him make a "root" out of stacked up Brazilian rosewood,and then paint it fire engine red. When a student asked why,this jerk said"I don't have any love affair with wood!" The amount of wood he used in a piece like that was just shocking,being solid wood all the way through. What a waste.