Have you read the RP Handbook? Parts of it are outdated because it was created back in the 1.0 version of the game before the reboot, so things like anima for teleportation no longer exist, but it could be a helpful read.
Other than that, there are a few basic RP no-nos that so long as you avoid them, you should generally be on a good path:
Don't godmode (RP that you're all powerful and invincible).
Don't metagame. (just because you know something OOC doesn't mean your character is capable of knowing it too)
Keep IC and OOC separate. (AKA. If your character hates or loves someone else's character with a passion, that doesn't mean YOU as a person also hate/love the other player OOCly.)
Other than that, there are a few basic RP no-nos that so long as you avoid them, you should generally be on a good path:
Don't godmode (RP that you're all powerful and invincible).
Don't metagame. (just because you know something OOC doesn't mean your character is capable of knowing it too)
Keep IC and OOC separate. (AKA. If your character hates or loves someone else's character with a passion, that doesn't mean YOU as a person also hate/love the other player OOCly.)