Shirt accessories do not come alone, there are plenty of "bling" that can and should be used to personalise your own shirts. It can be a little overwhelming for the beginner shirt wearer i.e. college fresh graduates, transiting from your t-shirt and jeans to formal dress shirt and trousers.
But stick to the basics, get those common items right, and move on from there. I have also been there before, when I had to search the net to learn how to put on a pair of cufflinks.
Some information about common accessories for shirts and how to use them properly are listed below.