How sweet! I have a little blue Cochin Bantam girl I got this spring whose coloring is nearly identical to yours as well as a blue Cochin Bantam roo that I got at the same time -- he is much lighter colored, more pale gray than true blue.
I'm a bit obsessed with Cochins these days. I got my blues because I LOVE my mature barred and red frizzle Cochin Bantams, and this spring I added three full-sized Cochins to the flock. Cochins are so personable!
My only "tips" are: keep an eye on those feathered feet because they get quite dirty quite easily; and try not to fall in love too hard with those beauties.