When you first start playing, you'll notice that the game is all about building and customizing your avatar, which is basically a powerful, magical version of yourself. You'll choose from a bunch of different talent trees that determine your abilities and playstyle. It's pretty overwhelming at first, but in a good way - like, you'll be thinking "wait, I can do all of these things?"
As you start playing, you'll realize that the game is all about exploration and discovery. You'll be exploring these huge, beautiful realms, fighting monsters, and collecting loot. It's super satisfying to find a new, powerful item or ability, and then use it to take down a tough enemy. And the environments are just, wow - they're so detailed and immersive, you'll feel like you're really there.