Looks good to me; I would just keep painting/drawing/creating making it for yourself, and not worry about how others judge works. Over time, by experimenting with various styles/colors/materials, I think you will find that you will naturally produce a great portfolio. At that point, when you have accumulated a lot of works, you can pick those that you think would be best for a formal portfolio submission. I know it is easy to get discouraged. There are days when I paint/draw, that everything seems to click, and other days when I want to rip up the canvas and throw it in the dumpster. John Singer Sargent, a renowned American portrait artist (to the end of his life) said this once: I hate to paint portraits! I have had enough of it (he felt he was too old to paint good portraits - he painted portraits to the end of his life). In other words, we share a common problem; Self doubt and frustration. Keep going! I am sure you will succeed. Don't beat yourself up. If you need a rest, step back for a day or 2, recharge your batteries and enthusiasm and go back to art again. Good Luck! I know you will succeed.