I'm slowly making progress on my postcard project for Facebook friends; I've finished six of the first series of 15 and am now working on the seventh. The first five were hackish copies of other artwork done by actual artists; the sixth was my first attempt at an original work. I used a photo of a Chinese aircraft carrier for reference to get the perspective, and then used a lineart concept drawing.
Main issues -- the bow is a mess, and I need a ton of practice with getting line weight correct. I tried a few things with this, but there is clearly a lot more for me to try and learn. And I got lazy and sloppy with the water and the logo, too,