The best way I know of to start with Shapeways is to go to their materials page and start getting very familiar with the various materials. In particular, the design rules for each of the materials. The materials page is here.
Good to have you in the forum! Lots of great people here.
It always was. It always was because somethingness cannot spawn from nothingness. And in the was of the past there is the forever of the now. Only now. Only now and nothing new, for anything new would add to the infinite, yet there can only be one infinite. Only one. The universe is only becoming something new in the delusion of our minds. This delusion that makes life worth living in our perceived universe becoming.