I think you are very early in the process and should hold off on such decisions. Give it another year before closing the door on a part of your life. As you said, riding in a group needs to be history. I know that I have to limit my need to depend on others to protect me from harm by keeping a protective safe distance.

Running has a different risk. The constant jarring from foot plants can be a challenge to the brain. If you start running again, try wearing foam ear plugs so you can hear the foot plant impacts. Then, you can learn a running gait that is easier on your head. A combination of good running shoes and a modified foot plant can make a big difference. Plus, this will reduce the stresses to your knees and hips.

So, wait and see before closing those doors.

My best to you.