The RX-350 does not use electricity as it has its own generator. Alabama actually slaps an extra charge each year for Hybrids to pay the gas tax for the gas the hybrid does not use. So if one drives less than 13,000 miles, they are paying more to the state than they should. Rip Off... I had a Camry Hybrid and loved it.
The two manuals that come with your RX are mostly easy to read and understand. Most of that stuff is already enabled and you just need to understand what it does. You lean as you drive. Yes it takes a while but it will all come a lot easier once you need it and use it. If you don't need it, it does not matter how it works.
I need all of the auto and emergency brake options, Air Conditioned seats, BSM, Radar Cruise, "Show Radar" to get the local Radar Map. Auto Speed Limit sign Display, Auto Tire Pressure monitor, Garage door home link, USB for tunes...
Don't use Paddle Shifter, Auto steering / Lane monitor, Car Play (good trade-in feature though), Internet connection to a live person. Only time I called to talk to a Nav person, she didn't seem like she was all that happy to hear from me, haha.
And Man, are you right about the Nav system. Like you say, they screwed that up royally. The Manuals is a bit hard to read on that. Zoom in and out does not work.
So time to dig out the books and go back to school.