D’Angelo Russell doesn’t have any idea when he’ll be ready to get back on the court. But the injured point guard joined his teammates on the current trip, with Russell, coach Kenny Atkinson and the other Nets saying it can only be a good thing to have him around, involved and engaged during his rehab. “I’m feeling better and better every day. So yeah, it’s cool,” said Russell, who saw the Nets bet the Grizzlies 98-88 on Sunday at FedEx Forum. “I don’t know [the timeline]. Really, honestly I’m just trying to stay healthy and get as strong as I can before I get back out on the floor. It’s definitely not something I want to rush. …. I’m not really forcing anything, just doing what the trainers tell me day in and day out and go from there, see how I feel every day.”