Welcome, I hope you find the guild to your liking.

I'm sure you'll find a lot of wonderful RP's to make use of here. Additionally, you might want to check out the Nation RP section, I've read a few interesting pieces from there that fit along the lines of your character scope.

As for coming off arrogant, that is just par for the course in most cases. As long as you follow the rules and explain your reasoning behind something when asked about it by a GM, I doubt you'll run into any issues, but that's just an assumption.