Rogues have little in common with each other. While some - maybe even the majority - are stealthy thieves, many serve as scouts, spies, investigators, diplomats, and simple thugs. Rogues are versatile, adaptable, and skilled at getting what others don't want them to get. While not equal to a fighter in combat, a rogue knows how to hit where it hurts, and a sneak attack can dish out a lot of damage. Rogues also seem to have a sixth sense when it comes to avoiding danger. Experienced rogues develop nearly magical powers and skills as they master the arts of stealth, evasion, and sneak attacks. In addition, while not capable of casting spells on their own, a rogue can sometimes "fake it" well enough to cast spells from scrolls, activate wands, and use just about any other magic item.
It is normal to find a penalty applied to your Pick Pocket skill. You should have received a "Pick Pocket Tool" item. Use this or the chat command "!pick pocket" instead of the radial menu if you choose to steal from another player or creature. This system was put into place to minimize griefing and will handle the success/fail and consequences of your attempt.