Start at the fuse box. Plenty of 1938 houses still have one, and a blown fuse at night means a hunt for the right size. We replace the box with a breaker panel and bring the service up from 60 amps to 200. That one project settles most of what an old house complains about.
Next, the knob-and-tube. It may still feed a few ceiling lights or a bedroom circuit, and it has no ground. We trace it, retire what is live, and run new copper. Ungrounded outlets get a real ground or GFCI protection.
Landenberg, Chatham and Kelton get the same crew. When the remnants of Hurricane Ida flooded parts of Chester County in September 2021, basements filled, so we also inspect any wiring down there that took water.