Philosophy oftentimes can become very abstract and otherworldly. This makes it out of reach for many people who would otherwise find it very useful.
The stream of what appears to be noise coming from ivory towers are not something very appealing to most people.
However, an ancient philosophy which is both practical and approachable is the one espoused by Epictetus who said:
Don’t explain your philosophy. Embody it
Epictetus was an advocate of stoicism which is a simple, practical philosophy of personal ethics.
Marcus Aurelius and Seneca were two other famous ancient Roman stoics.
The writing of these philosophers is very reachable to everyone. The philosophy is also timeless because, as humans, we could always make use of such a well developed and robust system of personal ethics.