They are not that bad. About what I would expect from a newbie.
The first one of the little girl is a bit cool on the temperature, too blue. And there is a little to much red tint. You can fix this in post.
The color on the other two is better but they are a bit crooked. Try to keep the camera level and watch how you background is effected by slight tilts. This is what we call distortion.
As for focus. The focus here seems adequate enough for printing. Really sharp focus comes from a steady hand and good quality lens. Im guessing you are just using the kit lens which is okay to start with. If you have a tripod you might try setting the camera on it and taking some shots. This would prevent camera shake. If you dont have one go get one. They come in handy. Your camera should also have a shake meter it it where it will show you when the camera is steady. Get used to using that and your shots will come out with better focus.