If you're looking for a finished piece (smooth finish) then you'll have to do a little more work post-processing the print.
The print on the left is what you get raw from the printer. The two prints on the right went through a vapor bath to smooth the contours.
We can help you learn how to use the 3D printer here. In addition to Tuesday and Friday, I'm available on Wednesday at 7 PM. I've been teaching folks how to use the 3D printers over the past few months and would be happy to help with that part. Unfortunately, I'm not sure how to work with Blender. Research how to export an .STL file from Blender and then you'll be good to go.