Bio Engineer Archive

I am currently 4223 and went to Dathomir today to try and sample some Rancor DNA. With my 2 in DNA sampling, is this absolutely pointless? Should I wait until I am either xx4x or Master before attempting something like that? And lastly, is quality DNA solely reliable on how far up the Sampling tree I am? Is it possible to get HQ DNA with sampling 2? Should I just grind through to Master, and then begin playing with the prof? Thanks so much for your time.

As a side note, I entered into BE to grind and drop...but I kinda like it. Might buy another account to pursue Jedi, and stick with BE for a while.