I am not an electric motorcycle owner, but feel responsibility to voice my advice. I am new to the forum, though not new to bikes. I came to this forum to learn about the electric bikes, see what people think, how is the reliability and serviceability. I have been riding motorcycles for a while, and my last ones were race liter petrol bikes (BMW S1000RR and Aprilia Tuono). I am used to high power and high speed.
When I took Zero SR/F for a test ride, I found the Sport mode to give an output similar to the Tuono. If you are not familiar with the Tuono, it is considered to be one of the few bikes that wants to leave you behind if you are not careful with the throttle and not holding tight. It will get you in trouble really fast.
I graduated to the litter bikes after riding scooters for a few years, then maxi scooter, then a sports bike... My BMW was the ninth, and the Tuono is my tenth bike.
Had I started on either of these two bikes, I am not sure whether I would be alive.
With my experience now, I find liter bikes easy to ride. They have super sophisticated electronic rider aids, and will keep the wheels on the ground and maintain traction. The problem, with these bikes however, is that a new rider is not going to be able to react quickly enough to the rapidly changing situations associated with high speed and high acceleration. They are just too fast. Target fixation, panic braking, bad line choices, early apexes, poor vision skills... these are all real things. Crashes are rarely caused by equipment failure; most are due to rider mistakes.
As I said above, the SR/F is very similar to the Tuono in acceleration. From what I read, Energica is even more powerful. And since I would not let anyone ride my Tuono, for fear that they would hurt themselves, for the same reason, I would not recommend Energica or Zero SR/F to a beginner rider.
Ihave been referring to the SR/F, when OP mentioned Zero SR. My understanding is that this bike does not have traction control. Considering how easy it is to lose traction on a high power petrol bike, I personally would want my electric bike to have traction control.
Once again, reliability considerations aside, I see potential problems not with the bike, but with the rider.
My recommendation to the OP is to start with a second-hand petrol bike, ride it for a year, sell it and then decide whether it is time to move on to a torque beast of an electric bike.