Very good eX, buy some very dark B pencils as well, when I drew alot, I used at least 6 shades of lead pencils to help with contrast. you can even go over parts of these completed drawings with a couple of darker ones to really make them pop. Consider your ins. pic half done, fill the black in with a dark B lead but don't press too hard, then smudge the blackest parts with your finger tip to smooth out your lines. It will add much depth.