The great thing is that it's all right.
Really, it is.
That pronouncing-all-your-rs thing. You can pronounce them and be rhotic - or not pronounce them all, and be non-rhotic. It's just a matter of geography.
For instance, do you pronounce the r in car?
You probably do if the word is followed by alarm (try it) but otherwise, if you come from England, you probably don't.
English-speakers from other places tend on the whole to sound their rs even when they come at the ends of words.
My Christmas cards, for instance, have only one r in them, after the Ch; my butter, when I talk about it, has no r in it at all unless it's in something like butter icing.
It doesn't matter. Usually.
Although I must admit that the Wicket the Ewok used to get in a terrible state when trying to say the word warrior, didn't he.
Thing To Consider Today: rhoticity. This word comes from the Greek rho, which is their name for the letter r.