To clarify slightly:
(a) the less realistic, more point-and-click software is called "VRC" not "VCR"; and
(b) *all three* of these are to be supplanted by the upcoming release of CRC.
With said release likely still being at least months away at this point, best course is to stay with VRC, vSTARS and vERAM for now instead of waiting for the software change.
VRC is the most common choice for beginning controllers, but some facilities are starting students on vSTARS which can be used for Delivery, Ground, and Tower services pretty easily also. And I believe that vSTARS is the only one of the three which facilitates a proxy connection for a Tower View. VRC definitely does not; I don't think vERAM does either but that one I'm not certain about.
Whichever facility you end up choosing and training with will advise whether they prefer you train on VRC or vSTARS, so, choose a facility and follow their Training team's guidance. If you later wish to switch to another client once you're comfortable and familiar with how to provide ATC services at your desired level, that's up to you.