If it's your first pixel, then I assume you're new to the site. Here, the comments section is mainly for critisizing. It's not saying that your picture sucks, it's to help you. See what the people have to say, then try to fix it in your next piece.
This is my first pixel art so you shouldnt expect it to be amazing
There's a lot of dithering on the plane, and it makes it slightly harder to understand the shading. Also, it looks like the wing towards the screen is slightly bent upwards.
Because of all this dithering, the plane looks... Fizzy.