Gratz on your purchase XD.
I wouldn't start RIGHT away with tricks and such but just get a good feel over your bike and then get comfortable. Anyways, I'd start with bunnyhops if you don't already know. You could also try barspins which might be a bit easier since you don't really have to hop. So work on both of them to get started but really make sure on the bunnyhop. Sadly, BMX's are horrible to travel, especially cities' you could try getting away with around town.