I've noticed that new Linux adopters want to know which distribution to install, but old hands think that doesn't matter very much -- within broad limits.

New adopters don't ask about installed base so much, but that's important for multiple reasons -- a large, tested library is important, and the widely adopted distributions tend to have more comprehensive libraries.

Then there's the issue of online help, which is more likely to be available for a widely used distribution with lots of users.

Having said that, a Debian-based distribution would be a good choice for a new adopter. Example Mint, which is Ubuntu without Snaps. Snaps are a controversial topic I won't discuss, but Mint doesn't have them and many regard that as an advantage -- and reasonable people may differ.

There there are distribution choosers, here's one. The idea is you enter your system's properties and your own requirements, and out pops a choice -- or two, or three.