I have already bought and installed LR stand alone.
Now I want to add PS - do I best sign up for the CC package or is there a way just to add PS? If I go for the package, will that conflict with my currently installed LR or will that become redundant?
Best option for you would be to go for Photography bundle as that would get you both PS & LR under the same plan at a nominal price.
Creative Cloud pricing and membership plans | Adobe Creative Cloud
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