@drdawg, Thanks so much for your kind note and for all your good info. I've fixed the spelling. Your Celadines are lovely!
I've seen conflicting thoughts on watering, and for that reason have held off so far, but can begin to do so at least to dampen the soil as you describe. When misting the cutting's growth, I gave some attention to the soil, too, but not so much. Got it with respect to fertilizer.
I have not tugged on the plant yet to see if there's any resistance, but can do so. I understood developing roots to be fragile, and was hesitant to disturb them.
The plumeria will get good direct sunlight in summer months. Other times will prove more challenging.
Thank you for your warm welcome and good advice!