Classic recommendations are Linux Mint and Ubuntu, I think Zorin as well, but there are many others. For starters which one you use won’t matter too much, because more likely than not you’re gonna switch again.

I started with Ubuntu because it’s easy to use and I was new. But I’m looking at Manjaro at the minute, an easy to install and beginner friendly Arch distro. Really, you can just try most of them out online though. Check out DistroSea and you can actually emulate the OSs with several desktop environments right in your browser.