It takes a huge amount of practice to get a hand plane working properly, so dont get discouraged that it isnt working perfectly at first. First thing you need to do it make sure the blade is razor sharp. Sharpening can be done with nearly anything that can abrade the steel, but personally i like using silicon carbide sandpaper (400-2000 grit) on a piece of granite. You can do the sharpening freehand, but a honing guide makes the process a lot more painless. An oft overlooked part of sharpening, though, it that you need to make sure the back of the iron is flat as well, and on cheaper irons they nearly never are by default. Flatten the back the same way you sharpen the bevel.
You also need to make sure the base of the plane is perfectly flat as well. If the sole isnt flat, the plane wont work properly. You can check flatness with whatever straightedge you have around. ust retract the blade, set the straightedge on the sole and see if you can see any light passing through gaps. If you can, you need to flatten the sole. This can be done with nothing more than a flat surface and some sandpaper. Find a way to affix the sandpaper to the flat surface and scrub the sole of the plane across, same as you would flattening the back of the iron. Keep at it until you can see any more gaps when held up to a straight edge.
Planes are pretty simple tools, and the biggest differences between the fancy ones and less fancy ones is usually it and finish. Take a few minutes to tune one up and you can get that Kobalt plane working every bit as well as a Veritas