My brother broke his hip similar to your injury so only screws were needed to make the repairs. He was back riding within a few months and got back to his old form. He still has a slight limp and some dull pain, including while riding. Fortunately no necrosis for him as well.
I‘M 67 and crashed riding on asphalt in August, 2018. I had a complete break in the femur neck at the base of the ball. The ball was also dislocated. There wasn’t a way to do a repair so I got a total hip replacement the next day. I had the posterior procedure (vs anterior) so recovery took much longer. I was back on the trainer in about 8 weeks and riding on the road in about 12 weeks. I probably could have started riding sooner but I also wanted the surgeon’s full support and permission. As a part of recovery I walked a lot.....maybe more than I should have.
Folks here generally indicated that it would take about a year to get back to normal and I think that’s about what I experienced. I thought of 2019 as a recovery year but even at that I was able to do 5 week long bike tours. I think I had around 6000 miles for the year and felt like I wasn’t riding as much. I don’t have any discomfort while riding. I do think I’ve lost a little muscle strength but I’m basically doing everything I was doing before the replacement. About the only times I notice the hip is when I’m trying to lift something really heavy, or I’m trying to push a really hard gear. It’s not terribly painful but the joint just isn’t real happy with it.
I enjoy riding longer rides and have ridden 100+ mile rides at least once the last 4-5 weeks with the longest being 137 miles. I also play golf and we walk 18 holes every morning Monday-Friday. It hasn’t affected my golf at all. I think that the lay-off while recovering affected my cardio.....I just haven’t gotten back to where I was before the crash. I probably could but that means a lot more effort and suffering than I’m wanting to do. So, I’ve slowed my speed down some but I just do what I feel like doing.
i recently sold my P2c as well. No more TT’s for me! I think Cervelo makes a fine bike for the money. I rode my R3 across the US in 2016 and recently bought a R3 disc. I know you’ll enjoy getting back into cycling shape! A year from now you’ll look back and feel great about your progress. All the best!
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Ride your Ride!!