mileage build from very little

Start with 2 miles per day (12-14 miles per week) then add .25 to each run every 2 weeks.

build yourself an easy longish and medium very easy runs first say 45mintues and 1 hour. and don't worry about running more than 3 times a week until all your joints and new footwear are proven to be working, walk when they aren't, or run-walk. You can not force anything. You have to find a way to get back to those basic foundational runs....at most dabble in a very small amount of zone 4-ish running after being very warmed up in an easy run and do some running drills and see if you can get a decent volume of those in gradually because you will want them later when your succeed with your return to normal running. Find out what kind of prehab most bullet-proofs you, and don't ever quit doing it for long.

I would try some barefoot exercises & barefoot running on a safe surface such as a football field or soccer field. This will help strengthen your lower legs & help you find a good running form as well. Just try 5 minutes a couple times a week to the end of a run. Eventually, I think 10 minutes 2-3 times a week will be plenty.

As for barefoot exercises, tippy-toes forward, tippy-toes backwards, tippy-toes inward, tippy-toes outward, heels forward, heels backwards.

Add barefoot strides X 4 too.

Hal Higdon running app Novice 1 program. Dont follow speedwork directions though. He does 3 days per week. At my peak that would have got me hurt. Mileage only.