It looks great to me, but I think that is not what you want to hear. If it makes you feel any better, we have all made our first quilt and I can testify, mine was less than perfect. A lot less. If you fell you can not give it away you can still fix it with minimal effort. Does your machine have any decorative stitches? Even a zigzag would help right now. You can use the decorative stitches using black, white, or actually, any color will do, and go over all the ditches. That will cover up all the areas where you didn't stay in the ditch, and will cover most of the areas where you fell your corners don't match.
There is no perfect quilt because no one is perfect. There are some out there that are near perfect, but the maker can always point at you an area where she(or he) feels she made a mistake.
Maria