Yes, you should trim the hair and the best way to do that is to stand Silk on all fours away from you, so her rear end is facing you. Second, lift her paw up and toward you so you have a clear view of her pad, toes, and the overhanging hair. I like to use thinning shears on Yorkie feet (NOT the paw pad) because it's more natural looking and less choppy. Third, you would comb all of the hair down over the foot. Fourth, you would trim the hair all the way around the foot in a circle shape and set her paw back down, the hair shouldn't touch the ground. One thing about the thinning shears, you can take a little off at a time to see how or if you like it! That's one of the great things about owning a Yorkie, your options are limitless, you can have her hair any way you like it! Good Luck, you'll do great!
P.S. Always trim clean dry hair for best results.