I don't use the same software as you, but I see that you have the resolution set to 72ppi. Always keep as high as possible for prints; but there is no point in going beyond 300ppi. The main risk here is that when resizing for printing you will end up with an image at, say, 6 x 4 inches by 72ppi which will not print well, especially if using glossy paper. You are starting out with plenty of pixels so don't throw them away. I reckon that 150ppi is the absolute minimum for prints while 300ppi is ideal.