Not sure if it's been mentioned yet, but I'd recommend that you get a physio to check you over before you go making big purchasing decisions. The last thing you want is to spend a not insignificant amount of money on something that makes things worse for you.
It was the idea of the physio to go with an ebike as I live in a hilly (for Norfolk) area. I see my physio reasonably often, at this time of year.
I have always been fit, ridden since childhood and used to be a good runner too.
I do HIIT both body weight and dumbbell sessions, Kettlebell sessions too plus Barre and Yoga. Most of me is in good nick, riding up hills though, even with a bike fit and a great bike, is giving me issues. I have a lovely ergonomic work chair, the one that I was advised by the works physio to get.
Back in 1983 I did manage to break my back, pelvis, left leg, buggered up a bunch of ribs and did some fairly serious damage to my left shoulder and upper arm. Very lucky not to break my neck. I did not fall off the horse, it fell over then the clumsy oaf rolled on me a smidge. Luckily, I sunk in to some nice fresh plough. I am quite bloody minded and got fit again. It took a while. Dangerous things, horses. I still ride, from time to time as I like to keep my hand in.
That Dimanche roadie, fits really well. It will need a tweak, here and there, the flared bars are gorgeous. The saddle was torture. I believe that a Fizik Aliante is the most uncomfortable thing I have ever sat on. Bloke has a Dimanche and has had it 3 years soon and, as yet, it’s not skipped a beat. He uses it to commute 7 miles each way to work (he has a weird knee which hates the cold), unless it’s raining which is what, he says, that VWs were invented for.