As someone who also plays an orc who defies tradition, there’s a lot of fun to be had butting heads with more traditional orcs who passionately cleave to orcish culture and clan culture.
For guilds, there’s a few that I can think of off the top of my head:
Here’s a selection of military guilds that are open to most members of the Horde and I’m quite sure that they would welcome a non-traditional orc, if you enjoy martial themes:
The Orcs of the Red Blade are a good choice for any orc and I can say with confidence that they’re not stuck in a Warcraft 2 mindset.
And while that they do not have a thread on these forums, I know that the Iron Wolf Clan are open to most members of the Horde and they describe themselves as a more modern clan.
There are plenty of other options out there and I’ve only listed a few, so I’d suggest shopping around and seeing which community fits your character the most.