Hi Berukie,
Congrats on your impressive pre-op times. I would start slow and short, take the first year to adjust and just build a base. After that anything is possible. I started racing 5K’s and 10K’s and later moved to marathons and now ultras. For me the longer the distance the easier it is on your hip. The pounding running sub 20 minute 5K’s took a tool and gives me pain in the hip area. You have to listen to your body and back off when it’s telling you. The majority of my training is slow and I’m still able to show up race day and do well, winning occasionally. I also do a little riding (stand up ElliptiGo to be precise) and think hip strengthening exercises will also pay dividends. I try to eat healthy (keto) and keep inflammation to a minimum, for me I think that’s the biggest risk. I’ve been running between 2,000 to 3,000 miles the last 5-6 years. Wishing you tons of luck and many miles.
Dave