I would disagree with some of the advice. I would think you’re already going to get the benefits of elastic effect because the OD is so far behind the DR/HA. Similarly, you’re never going to get OD to a useful level. So i would do a several weeks of OD to start, bite the bullet now, and get it to a non-zero level. Something like 3-4 so he’s not a total liability and then you can switch him to C defend.
In terms of shooting, my experience is JR needs to be quite high to truly be an “outside” PF so it probably makes sense to devote some time there as well. This will pull up the JS so 1v1 forward should take care of the rest.
Passing I think you can sprinkle in over time it is starting at a high level already.