Let's just say it is not "unnormal." I have about 13,500 miles on the MY LR I've had for almost a year.
I use Tesla Fi to monitor my car. (There are other apps out there, but Tesla Fi does it for me.) Besides showing what your 100% charge should look like, it also compares your car to others with similar mileage. Back on October 4, I posted a screen grab to this thread and it shows I have more loss than other MYs. Today, I am at 292, but still well below the rest of the pack which is 303. Of the 45 cars being monitored, there are three with worse records.
There was once a funny, yet scary, movie titled "Dr. Strangelove: Or How I Learned to Stop Worrying and Learned to Love the Bomb." I stopped obsessing with watching the energy app in the car and just plain learned what a great car the Model Y is. You are well below the warranty failure point and you have more than enough to get wherever you want to go.
I am currently planning a 2,000 mile trip from deep south Texas (where I live) to San Francisco to see our daughter. Using the "A Better Route Planner" app, I will never come close to running out of electrons - and that is without ever charging up to 100%.
As to keeping it plugged in - why wouldn't you keep it plugged in each night when you're not driving? Each morning, when you get up, you have a "full tank." I charge mine to 85% each night and don't have to worry about having to take an unplanned longer drive at the 25% you have in the battery. Let go of the habits acquired driving an ICE car, such as going to the gas station at 1/4 tank, and keep it charged up.
Now, stop reading this and go drive the hell out of your MY. Go find some kid in a Mustang and drag race him. Turn up the sound system and listen to your favorite music. Have fun with your new toy.