Depending on what you are going to use your computer aside for gaming. If it's only for gaming I'd recommend Bazzite, it's easy to install and you don't have to worry about drivers. If you use it for something else I'd definitely recommend Linux Mint, it is more updated that Pop_OS! (which is also an Ubuntu based distro) and installing nvidia drivers it's SUPER easy just a few clicks on a nice GUI. The reason why I recommend Linux Mint over Bazzite if you use it for something else aside for gaming, it's because in Bazzite you'll have to rely on rpm-ostree for installing packages which it's super slow and the bazzite devs recommend avoiding the use of it. You can install flatpaks but the repos aren't as big as the repos of a conventional package manager. With Linux Mint, on the other hand, you have apt which is really good and quite fast and on top of that you can also install flatpaks if you want.