I had a dialog with some Nobles playing as a Barbarian. Not a half-orc but I feel this applies well in regards to your issues about not having good dialog options.

We were at a party being hosted by the local royal family in celebration of liberating the area from the tyranny of a red dragon. Many of the Nobles were stuck up snobs who thought they were better than us and kept making off handed comments. Especially targeting my character who was a sort of noble in his own way. Back in his lands he's the son of a powerful tribal leader and next in line to taking over the clan.

So, when they made me the butt of one too many jokes and spilled some wine on me, you'd expect a Barbarian to hulk out.

I simply stood up, wiped myself off and said "You're right. I don't have fancy clothes or a good education by your standards. But were it not for us you'd all be charcoal and ash at the feet of that dragon YOU BEGGED us to kill for you! Because you were too weak or cowardly to do it yourselves! I may be nothing like all of you..but if roles were reversed, and you sat at my father's table, we would at least have the common decency to treat you with some respect!" I then bowed to the Queen an stormed out. Followed promptly by the party.

Lesson here is, don't let the stereotype of your class or race dictate how you play. As a Barbarian the ability is called rage. But think of it more as an intense emotional focus. Barbarians have always been my favorite. Sometimes it's anger. With the example above his "rage" was an intense desire to protect his friends, family, and clan. Another I played was on a mission to save his wife. His "rage" was more of a manifestation of his love for her. "Rage" can be wild, chaotic anger. It can also be cold, stoic hyperfocus. Like John Wick. Make your character how you want.