If you are just learning Resolve, chances are you don't need the features you miss out on with the Lite version. You lose stabilization, noise reduction and shared workflow, maybe some other things I am forgetting. Noise? Learn to light your scene better. Shaky footage? Cmon now, don't rely on post to fix that.
You get an alright NLE, one of the best color grading tools, and 4k rendering for free. Use a compositor if you need more effects. I bought my camera used without the dongle, haven't really needed it. Noise reduction would be useful but I have other programs for that, if needed.
As to your original question, the dongle is like a mobile license for the studio version, whoever owns it, has the license. It has to be plugged in to be used.