My vision has never been great and aging has added new challenges. The simple way would be to move to a digital camera and an autofocus lens but what fun would that be? The best answer is to skip focusing altogether!
Since it's technically my birthday present, my SO is stashing it away until then.
If you haven't already read it, this four-part series by Zeb Andrews of Blue Moon Camera and Machine is the best introduction to pinhole photography I've ever seen. Here's a link to the first article; each article has a link at the end to the next article in the series.