Once the honeydo and house renovations are done (are they ever); there are lots of volunteer opportunities out there. For instance, our church has a group of men that meet every Tuesday morning and take care of the landscaping and minor repairs at the church. There is also Habitat for humanity, they welcome volunteers to help with their builds. Locally we have a ramp building organization that provides free ramps for those homes that need them. When the need is finished, the remove the ramps and recycle the parts that are in good shape.
You can be as busy as you want to be when you retired. I have very few days where I have nothing to do.
Whatever you do avoid boredom as that leads to eating and eating leads to sitting in an easy chair.