Hi Catch and welcome to TSF
Congratulations on the age....some of us here are near your age.
Cell phones use very little power while charging. They sell adapters that plug into the cigarette lighter hole that will charge your cell phone. Just take your phone into any store that sell phones and they will have an adapter.
It is ok to leave it plugged in if you like. Phones turn theirselves off when fully charged, so no drain on your car battery after that point.
I have one that I use for emergencies and leave it in the vehicle. I like the regular phones better while at home.
Have a nice day,
Mack1