Mint would still be my initial choice, unless you’re really intending to dive right into playing the latest AAA games in which case Bazzite might be a better starting point.

But it’s really easy to install both. You might even prefer to have both. You can install Mint on a disk partition with only 50-100GB or less. Most Linux installations will work fine with about the same. It’s only once you start installing games that it’s going to consume tons of disk space.