I did a marathon training program with Fleet Feet in the past. The groups for 5k, half marathon, and marathon all met at same time for many of the runs. Of course the distances being run were different for each group. But it seemed many if not most of the 5k group were new runners. They all seemed to be enjoying themselves and getting something out of it. I don’t think it’s expected that 5k group comes to it with high baseline fitness.

Part of being a runner is the great camaraderie of the running community! The Fleet Feet group will have great mentor/other runners that you will meet.

I highly recommend you give it a shot.