If you have a computer background already then dive in! For a gaming rig try PopOS or Nobara.
PopOS is Ubuntu based and used Gnome. They’re hard at work on a new custom DE that appears Gnome-like. PopOS is made by hardware company System76 to improve upon Ubuntu’s support of newer hardware they wish to sell.
Nobara is Fedora based and recently switched to KDE Plasma which aligns with the Steam Deck. Nobara is specifically tweaked for gaming.
Here we go! Congrats to the System76 team!