Originally created from Jango fetts DNA, at first they kinda fought for the "rebels" and the light side jedi you know the "good guys"against the droids. But then they defected and joined "evil empire" becoming stormtroopers
Well, according to the animated series Star Wars: Clone Wars and Star Wars: Rebels, the clone troopers are typically good. They develop their own personalities and mannerisms, some can be cruel or kind, others brave or cowardly. Considering they're fighting for the republic they generally are considered good guys. Which is why Palpatine had them implanted with a mind control chip that activates upon activating Order 66.
And for future reference, the storm troopers in Episodes IV-VI are NOT clones. They were decommissioned shortly after the clone wars and regular soldiers were used for the Empire.
Don't worry. If you mess up and say the wrong thing, you can always just wait until you watch Return of the Jedi and ask your crush whether or not he thinks princess leia's costume would look good on you.