I am 77 next week, so in the same ballpark as you. I have an Evelo Omega that I bought a year and a half ago, and I love it. About 60 pounds, mid drive, a step through frame you might really appreciate, with enviolo rear hub that automatically does all the shifting for me, you just set your desired cadence. I thought i would miss shifting myself, but i quickly got used to it, and now love that too. One thing thats especially good for hills is that it has a very powerful 115 newton meter rating, one of the highest ratings. It comes with a throttle, nice for taking off at intersections. And it has a belt drive, so no grease, no cleaning, almost no maintenance, and belts last a lot longer than chains. It can go up to 28mph if you set it for that, but comes set to go up to 20mph. Evelo bikes come with a 4 year 20,000 mile guarantee. Evelo’s customer service is top notch. Whenever I’ve had a question, they get right back to me within a day or so, sometimes the same day. If you like, they can ship to a bike shop to do the assembly and setup for you, or ship to you if you want to do it yourself, like i did, but I’ve built and worked on bikes for years. They are not like cheaper $1000 to $2000 bikes, but I think they are well worth the money. They sell for $4199.99 right now, but worth every penny. Black Friday sales might be better. I added a second battery on the rear rack, that gives me up to 100 mile range.