Welcome! Lets see, I did the pet store not sure what exactly age/gender you have too. A vet will give you an idea. But if the testicles haven't descended i'm not sure they can tell either. My guys dropped at around 4 months so depending on age it could be a while. Pretty much that's the only difference visible for sexing. If you didn't want to wait that long to name him/her you could go with gender neutral name. Bunjamin got called "Bun Bun" for a couple weeks.
Of course we like pictures *nose bump*
OoO another good resource to check out that helped me a lot to understand "bunny language" is http://language.rabbitspeak.com/
Once I read that like 3 times over and started following the advice it wasn't too long before Bunjamin started asking for pets and all that cool stuff.
Oh and about all the nerdy stuff... Feel at home. There's a bunch of gamers here too. I'm a PC gamer myself