Sacred Haven of Debauchery

I've been playing Oblivion a bit. There was this thing where I got out of prison, and the guard said, "You're like an acrobat, Vasya." So I thought, "Okay," and left the character who was good at acrobatics in the classes, and I took a constellation for a thief, and I have an elf. From the forest. And I'm running around everywhere, exploring all sorts of ruins, sneaking around, killing BANDITS and skeletons with stealth headshots from a bow, I'm totally overpowered, why didn't I play like this before? There's also lockpicking and other stuff, I don't remember. And I couldn't take a screenshot for some reason. But I robbed bandits in the ruins and stole stones and stuff.