Mint or Fedora. You’ll get tons of responses, and none of them are wrong, because no one can tell you what’s best for you, but those are the most popular choices among newbies, and they are very user friendly and approachable.

The best advice I can give you is try a bunch of different ones and see which one you like best. They’re free and easy to reinstall if you end up liking one over another.

Best of luck and I hope you find one that you truly love. :)