Would I be wasting my money to get a turntable?

Perhaps the Sugar Cube example provides insight into this question.  A Sugar Cube is a gadget that removes clicks and pops from scratchy or otherwise noisy records.  It does this by making an instantaneous copy of the music digitally, automatically editing out the noise, and then allowing the cleaned up signal to be amplified and played.  The user can compare before and after to hear what the effect is both of the noise reduction and of digitization of the musical signal.  It is so effective that many users simply leave it on full time.  In other words the digitization of analog signals as a serious degradation of purity is greatly exaggerated.  There is no reason for you to deny your desire to add a turntable and records to the enjoyment of your hobby.

Yes, in another thread I asked why it is that an LP made from a digital source often sounds good.  Frequently better than what might have started out years ago as an analog master tape.  The answer is all in how the mastering engineer works his or her magic.  I have many examples of digital master tapes as the source used to make Redbook CDs, LPs, high res files and DSD.  The end result can be satisfactory in any format.