What would reasonably take to get current to fly general aviation aircraft after many years
I am a private pilot and rent old planes, like 73 Cessna 172, with exactly the old instrument panel.
I am a 74 years old retired civil engineer. and fly only VFR.
Here in our airport, Van Nuy, there are many CFI's who would get you up and going in a few hours and will sign you off when you're ready. they charge $30 per hour; and are much younger than our kids.
you would want to look at an airport near an aviation colleges, those kids need hours as CFI. And are very up to date on the latest technologies and what gear is the most reasonable. Like what navigation on which iPad, headsets, what not.