Your body size & leg size matters when suggesting a bicycle. I put together a nice list for a lady 62" tall that might be completely wrong for you:
https://electricbikereview.com/forums/threads/help-please-my-brain-is-on-overload.42851/unread
Do you want to sit straight up or hunch over the bars like an olympian? Is touching the ground with both toes okay or do you need flat feet to feel secure? Are you going to climb 1000' mountains in an hour? or just rolling hills without a lot of rise? How much groceries? 20 lb? 60 lb like me? How fast? up to 15 mph no suspension required, >20 suspension required, which costs $500-1000.
1000' mountains in an hour require a mid-drive, which cost more than a hub drive, wear out chains faster, and strand you if you break a chain or the battery goes dead . Mid drives are easier to buy with torque sense which feels very natural, but there are hub drive bikes now that have it.
PAS is cheap. PAS is jerky, often has a minimum speed of 11 to 14 mph, and can cut in while U-turning which is dangerous.
How many miles you going to ride in a year? Some bikes wear out fast, others cost more and go years without much but tires & tubes.
How much time in National Parks or city parks that don't allow throttles? Some parks allow throttles on road, but not on bike paths. A throttle is a device that you twist or push with your thumb to make the bike go a certain power without pedaling. I require one as my Army damaged knees sometimes lock up entirely. You may be more flexible about always having to pedal to get power assitance.
I'm 70 +11/12ths, and don't feel the temptation for a 3 wheeler yet. I'm also okay with falling off, as long as I'm wearing polyester dickies and a helmet with chin guard. Doesn't hurt that much except if I strike the chin. 3 wheeler with two back wheels tend to fall over if turned too fast. 3 wheelers with two tipping front tires are safer, and cost ~$5000 up.
Really unless you are an accomplished mechanic, a run up to Tuscon or Phoenix to try out Trek & Pedego models would be very instructive. They are not cheap, and don't have a lot of problems reported to this website. The dealers are everywhere, if you are going to be out in an RV and need warrenty service. A lot of home delivery models, you are the repair department unless you live somewhere that velofix will come to your home (I don't).