For ease of access, I suggest that you consider a step thru or open frame design. Makes mounting and dismounting much easier. And stay away from the mid-step thru models ... they really don't work very well for stepping through. Invariably, owners end up lifting their leg over the side like they do on a regular bike.
As far as sizing recommendations, don't believe the manufacturer's recommendations. They may say that their bike is suitable for riders 5'2" to 6'5" tall, but don't expect to feel comfortable if you're at either the low end or the at the high end of that range.
Mid drive or hub motor ... I'd suggest that you base this decision on your budget. There are a lot of quality hub driven e-bikes on the market for under $2K. You'd have to spend around $3K to get a similar build quality mid-drive.
Motor size, battery capacity. Bigger is better, right? You don't know what you're getting until you've got it. That's true of whether we're talking about battery life, top speed, rideability, or any of the other factors that you base your purchase decision on. Most of the time you're lucky to get a set of full specs from the manufacturer plus a few anecdotal bike reviews. Hardly enough information to base your decision upon. Moreover, I suggest that what you're looking for in a bike CHANGES over time. What you think is important now, may change drastically after you've ridden your bike for a while.
For example, one of the things that I noticed is my concept of speed. When I first received my e-bike I was enamored by how fast it could go ... so I rode it as fast as conditions allowed me. After a while, it dawned on me that there was no reason for me to bike so fast (and plenty of good reasons for biking more slowly, like getting more exercise in). I now ride my bike 8-10 mph slower than I used to and I'm a lot more comfortable doing so. While there is no way for you to know now how riding the bike will change you, I'd suggest that you WILL change. So, getting back to the "bigger is better" question, while getting the biggest motor and the largest battery gives you the most flexibility to operate your bike ... power, speed, and range may turn out to be not that important for running your day-to-day errands.
A related issue is aging. How you ride your bike will change as you age. I figure that the lifespan of my ebike is around 5 years. If I get 5 years out of it without any significant breakdowns, I'll be happy. Moreover, with the rate of technological innovation, I expect that I will want to buy another bike about that time. I hope that the aging process is slow enough at my age (68) for me to maintain my riding style for at least that long a time period, but you never know.
Security. I think most people buy their bikes without thinking about how they are going to secure their bikes. Where and how will they secure the bikes at home, at work, at the park, at the grocery store? A $5K e-bike is a prime target. If you're going to spend that much on a bike, be sure to spend a good amount of time and effort securing it. My bike is secured with a 10mm hardened steel security chain anchored to a foundational wall of my carport and the bike is parked recessed within the carport (away from prying eyes). Someone is home nearly all of the time and my neighborhood consists of mostly retirees, so I think the risk of theft is reasonably low. I'm not out to stop a professional bike thief. I'm only trying to discourage vagrants or druggies that might happen to be looking for easy pickings. I also installed an Apple Airtag for GPS tracking, if the bike should ever be stolen.
As far as specific bike recommendations, I can only share my experience of owning a Magicycle Ocelot Pro. It's a capable bike, ready to handle anything from dirt trails to city roads. By adding a Suntour NCX suspension seatpost, it feels like a bike with full suspension. I like it because it allows me to sit with an erect posture, instead of being haunched over the handlebar. It's nimble. It's fun to ride. If you're interested in more information, check out Magicycle's Facebook group: https://www.facebook.com/groups/4346764052074707/