the first thing i did in my 3d printing journey is find a project on thingiverse the thing i choice was a nice decorative lighthouse on a rock.
then i copied the files
next you go to Dremel files and their are three steps
the three steps are repair ,layout,and slice.
then you should have a few different files that you want to keep
to repair you press the repair button and switch to the right printer aand then press fix.
then click on layout it will take you to a screen like below
then press on bed and center till the numbers change
then you move on to slice and i printed it heres the finished project