adding a tl1

Hi guys, just added a tl1 to my vf 2. Never had a cnc lathe before and having a hard time wrapping my head around the co ordinate system. Its so different to the vf2 in terms of mindset. Never had to think about axis on the manual mill. Any one with wise words to offer it would be greatly appreciated or any website to steer me to.
thanks in advance.
Mark