Nylon needs to be dried over night and placed in the printer enclosure right from the dehydrator, assuming you have your printer in an enclosure. I personally never change filaments types without running cleaning filament through the hot end to remove all of the pervious material, never will have a clog if this is done religiously.

I have never had a print turn out like that so hard to guess, I would say it looks like it is way too hot, and printing way to fast. Max speed anything thing should be moving on something that small would be maybe 25mmS.. Extrusion multiplier should already been calibrated and correct with a simple 2 walled square designed for your extrusion width. My suggestion would be to work with PLA for a few month and learn the slicer and machine before try to work with Nylon.