No problem leaving it plugged in, any more than any other new appliance.
However, good to check any new appliance (and the socket that
it is plugged into) frequently, just
in case it proves to be defective in some way.
Yes, it uses a little electricity whenever plugged in, but not much.
Instead of being overwhelmed by all the new information,
just try many shorter trips, so range is not even an issue,
and enjoy the "feel" of the e-ride.
Then, learn the Nav enough to Go Home.
Then, you set other destinations... before you start.
Mostly, relax and enjoy learning the "personality"
of your new eeee-car.
See SOC/GID-Meter and CAN-Do Info
2011 LEAF, 2014 Tesla S85
2018 & 2019 Tesla Model 3
Solar PV: 33 x 225W -> 7 kW max AC
Craigslist: Xm5000Li Electric Motorcycle