To be fair Ubuntu is still okay especially starting out, it's one of the more polished distros with a ton of online documentation when you need to search around and figure out how to do things. And no one says you have to stay with a distro, once you're comfortable with Linux it's easy enough to check out other distros.

That aside a lot of people have been recommending Mint for new users so that's definitely one you can check out if you want to try branching out now rather than later.

PS - Nvidia has a less than stellar reputation for their Linux drivers, you may want to consider reading up on that for whichever distro you choose. I have an Nvidia GPU (old non-Quadro class) running on Debian, works fine now but I did have a few false starts getting it going properly at first.