It took quite a bit of assistance to get things all wired together, so a big "Thank You" to my fellow bootcamp members! I quickly learned that simply telling applications that they can't access anything is self-defeating, though one particular application reacted by simply not letting go of the screen. Thankfully someone was on hand to tell me about the button in the lower right, and how to terminate an offending application by sweeping up on it. And I then quickly learned that pressing an app button spawns a new instance of that app, whether or not an instance was already running. I quickly terminated a surprising number of duplicate app instances that I had spawned over the prior day or so.
Someone also took pity on me and showed me how to silence alerts from attention-seeking apps, with one notable instance being an app that liked to let me know when spam arrived for each instance of spam.
But having a portable GPS receiver has proven handy a couple of times already, so I can already see how these things could become quite addictive. Yes, I resisted for a great many years, but my smartphone-free days are now officially over. :-)