I have the same 2015 15in Macbook pro.  It was issued to me for work and they let me keep it when I got an upgrade.

Even though it is 9 years old, it is still more than capable of being a daily driver.

A few years ago, I switched from MacOS to Fedora.  All the hardware is supported except bluetooth.

When I first tried linux on it, I installed Fedora on a thumb drive, and would install/remove the drive based on which OS I wanted to boot.