Thanks for the comments/advice.
I assumed he was feral because there is a feral colony very near here. I assumed he is young because he is quite small. But exactly a year ago, the people who lived behind me reported that their cat, who fit this description, was missing. They moved out...
I always wanted a cat, preferably a Ginger, but my house is not "cat friendly" for several reasons (other pets, exposed cables, new carpeting, etc.). At some point I plan to build a small addition to house one, but for now I've been reduced to watching Internet cat videos and learning...