PC-BSD is now called TrueOS, not sure if I can recommend with going BSD based distro if you don't have much experience with using Linux/BSD.
Ubuntu is a good place to start and when you get used to it, you can go from there and try out various distros, see which you like the best.
Started out with Ubuntu many years ago, since then I've tried Mint, (including Debian edition), Debian, Fedora, Arch, openSUSE, Sabayon (Gentoo based, it's quite nice), and now Solus.