We are a commune of inquiring, skeptical, politically centrist, capitalist, anglophile, traditionalist New England Yankee humans, humanoids, and animals with many interests beyond and above politics. Each of us has had a high-school education (or GED), but all had ADD so didn't pay attention very well, especially the dogs. Each one of us does "try my best to be just like I am," and none of us enjoys working for others, including for Maggie, from whom we receive neither a nickel nor a dime. Freedom from nags, cranks, government, do-gooders, control-freaks and idiots is all that we ask for.
This generally works with dogs too. Basically ignore their barking and display of aggression and do whatever it is that you intended to do and they will usually calm down. Do watch out for the occasional dog who didn't get the message.
As a landlord I would occasionally have to go to a hose where the tenant had and aggressive dog. I would carry a garden shovel (the kind with a handle grip about four feet in total length). If the dog is approaching keep it between you. If you are approach hold it in two hands (I don't mean aggressively approaching because as stated above you are ignoring the dog. But make no mistake the dog knows what you have in your hands and becomes cautious or docile.) Most dogs that are likely to bite will bite once and back off. The thing you want to do is dissuade them from making that first bite.
Fear does often abate when we face it, but the point of courage is not to eradicate fear, it's to do the right thing in the teeth of fear, maybe even gut-wrenching overwhelming fear. Often courage also means setting a good example for others by maintaining control over one's actions in terrifying situations.
Fear is nature's way of trying to save your life or limb. Do not simply ignore it or "overcome" it and push on into the great unknown. Read the newspapers and you will see everyday the result of ignoring fear or "overcoming" fear. Limit yourself to not allowing fear to rule your decision process but not as a challenge to prove it wrong. It is most likely right.