I test drove one then bought a different car about 12 months later with no test drive. The dealer just handed me the keys and said 'bye'....after a few seconds of panic I went into 'rental car mode' to figure out where the controls were until I got it moving. After that, everything was fine.
On my 2017....once it's started and in gear you will have no trouble. To start, just put your foot on the brake and push the button. About the same as any modern car without a regular key.
The gear selector operates by being pulled sideways towards you and push forward for reverse or over and pull back for drive. The parking brake (2017) is push on, push off. Turn signals, wipers, lights, brakes, accelerator are all normal.
I'd ignore the dash displays until you get the hang of driving. There's a lot to learn there and nothing on the dash is required for normal operation as long as you have enough charge to get safely home. The climate control also has a small learning curve but you will figure that out quickly.
Have fun and enjoy the ride. The first trip in an EV can be really exciting.