I'm 73 years old, and the only thing that gave me fits at first was the very different behavior of the accelerator pedal. In driving stick shifts since 1975 (two BMW's and an Audi) I had lots of situations in which I'd declutch and get off the gas pedal entirely.
So in my first few seconds on the Tesla I was jerking around in the parking lot as I repeatedly failed in the basic action of just letting off the pedal partway, finding the pressure that gave the acceleration or deceleration I needed at that moment. It is a continuous function.
Get that right, and the rest is pesky details. Yes, it can be hard to find things, such as the glove box release, the windshield wiper control, ... But training yourself to use the accelerator is the the only biggee. Just give yourself some time away from conflicting traffic. Most people get used to it pretty fast, and some have no trouble from the beginning. My wife figured it out right away, having watched my bumbling start ten minutes before her turn.
Riding with an experienced user who can answer usefully "how do I?" questions might actually help. Probably different things will hang you up than another, so that may work better than a fixed syllabus.